23 (number)

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← 22 23 24 →
Cardinaltwenty-three
Ordinal23rd
(twenty-third)
Numeral systemtrivigesimal
FactorizationPrime
Prime9th
Divisors1, 23
Greek numeralΚΓ´
Roman numeralXXIII
Binary101112
Ternary2123
Quaternary1134
Quinary435
Senary356
Octal278
Duodecimal1B12
Hexadecimal1716
Vigesimal1320
Base 36N36

23 (twenty-three) is the natural number following 22 and preceding 24.

In mathematics[edit]

In science and technology[edit]

In religion[edit]

  • Psalm 23, also known as the Shepherd Psalm, is possibly the most quoted and best known Psalm.[20] Psalms is also the 23rd book in the Douay–Rheims Bible.
  • In Islam, the Qur'an was revealed in a total of 23 years to Prophet Muhammed.[21][22]
  • Muslims believe the first verses of the Qur'an were revealed to the Islamic prophet Muhammad on the 23rd night of the 9th Islamic month.[23]
  • Principia Discordia, the sacred text of Discordianism, holds that 23 (along with the discordian prime 5) is one of the sacred numbers of Eris, goddess of discord.

In popular culture[edit]

Music[edit]

  • Alfred Harth uses the number 23 in his artist name Alfred 23 Harth, or A23H, since the year 1+9+8+5 = 23.
  • Twentythree is the name of Tristan Prettyman's debut album
  • Twentythree an album by Carbon Based Lifeforms
  • "Viginti Tres" (Latin for twenty-three) is a song by Tool on their album 10,000 Days
  • Blink-182's song "What's My Age Again?" includes the lyrics "nobody likes you when you're 23."
  • 23 is an album and title track by Blonde Redhead
  • "23" is a song by Jimmy Eat World, on their album Futures. The number also appears in the songs "Christmas Card" and "12."23".95" as well as on some items of clothing produced by the band.
  • Four tet and Yellowcard both have songs titled "Twenty-Three".
  • Dear 23, an album by The Posies
  • Untitled 23', an album by The Church
  • Noah23 has several albums which reference the number 23.[which?]
  • "23 Minutes in Brussels", a song by Luna on their album Penthouse.
  • The composer Alban Berg had a particular interest in the number 23, using it to structure several works. Various suggestions have been made as to the reason for this interest: that he took it from the Biorhythms theory of Wilhelm Fliess, in which a 23-day cycle is considered significant,[24] or because he first suffered an asthma attack on 23rd of the month.[25][importance?]
  • "23" is a single by Mike Will Made It
  • On the cover of The Beatles' 1969 album Yellow Submarine the number 23 is displayed on the chest of one of the Blue Meanies.
  • Network 23 refers to members of the Spiral Tribe. Sometimes 23 used to discretely mark the spots of a freetekno rave.
  • The number 23 is used a lot throughout the visuals and music by the band Gorillaz, who have even devoted a whole page of their autobiography Rise Of The Ogre to the 23 enigma theory.

Film and television[edit]

  • 23 is a German film about Karl Koch.
  • In Jeepers Creepers, the Creeper appears every 23 years for 23 days to feast on human flesh.
  • In L: Change the World, the protagonist L signs his own name in the Death Note notebook and somehow knows that he has given himself 23 days to live, revealing a 23 day rule for the maximum number of days a person may live after they are added to the Japanese god of death's Death Note.
  • The 1980s TV series Max Headroom was set at Network 23.
  • In The Big Lebowski, the main characters deliberately use only lane 23 at the bowling alley.
  • In The Matrix Reloaded, the Architect tells Neo it is of utmost importance to choose 23 people to repopulate Zion.
  • The Number 23 is a 2007 film starring Jim Carrey about a man who becomes obsessed with the 23 enigma.

Other fields[edit]

  • 23 skidoo (phrase) (sometimes 23 skiddoo) is an American slang phrase popularized during the early 20th century. 23 skidoo has been described as "perhaps the first truly national fad expression and one of the most popular fad expressions to appear in the U.S".
  • The 23 Enigma plays a prominent role in the plot of the Illuminatus! Trilogy by Robert Shea and Robert Anton Wilson.
  • The 23, in South Africa, refers to the 23 conscientious objectors who publicly refused to do military service in the Apartheid army in 1987. The following years the number increased to 143 (in 1988) and 771 (in 1989), with Apartheid being dismantled from 1990 onwards.[26]
  • In The Legend of Zelda: Ocarina of Time, within the first dungeon, a deku scrub states "The order is...2 3 1. Twenty-three is number one!" as a hint to defeating his brethren deeper in the dungeon.
  • X-23 is a character in the Marvel Universe. She is named for being the 23rd attempt to create a female genetic twin of Wolverine after attempts to create a male clone failed.
  • The soft drink Dr Pepper is flavored with a proprietary mixture of 23 flavorings.[27]

References[edit]

  1. ^ Sloane, N. J. A. (ed.). "Sequence A088054 (Factorial primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A050918 (Woodall primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  3. ^ Guy, Richard; Unsolved Problems in Number Theory, p. 7 ISBN 1475717385
  4. ^ Sloane, N. J. A. (ed.). "Sequence A005384 (Sophie Germain primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  5. ^ Sloane, N. J. A. (ed.). "Sequence A005385 (Safe primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  6. ^ Sloane, N. J. A. (ed.). "Sequence A063980 (Pillai primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  7. ^ Sloane, N. J. A. (ed.). "Sequence A100827 (Highly cototient numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  8. ^ Weisstein, Eric W. "Cyclotomic Integer". mathworld.wolfram.com. Retrieved 15 January 2019.
  9. ^ (sequence A045345 in the OEIS)
  10. ^ Puzzle 31.- The Average Prime number, APN(k) = S(Pk)/k from The Prime Puzzles & Problems Connection website
  11. ^ Sloane, N. J. A. (ed.). "Sequence A005235 (Fortunate numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  12. ^ Sloane, N. J. A. (ed.). "Sequence A001190 (Wedderburn-Etherington numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  13. ^ Sloane, N. J. A. (ed.). "Sequence A069151 (Concatenations of consecutive primes, starting with 2, that are also prime)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  14. ^ Sloane, N. J. A. (ed.). "Sequence A007770 (Happy numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 31 May 2016.
  15. ^ http://www.math.grinnell.edu/~chamberl/papers/bbp.pdf
  16. ^ H. Wramsby, K. Fredga, P. Liedholm, "Chromosome analysis of human oocytes recovered from preovulatory follicles in stimulated cycles" New England Journal of Medicine 316 3 (1987): 121 - 124
  17. ^ Barbara J. Trask, "Human genetics and disease: Human cytogenetics: 46 chromosomes, 46 years and counting" Nature Reviews Genetics 3 (2002): 769. "Human cytogenetics was born in 1956 with the fundamental, but empowering, discovery that normal human cells contain 46 chromosomes."
  18. ^ Mohr, Peter J.; Taylor, Barry N.; Newell, David B. (2008). "CODATA Recommended Values of the Fundamental Physical Constants: 2006" (PDF). Reviews of Modern Physics. 80 (2): 633–730. arXiv:0801.0028. Bibcode:2008RvMP...80..633M. doi:10.1103/RevModPhys.80.633. Archived from the original (PDF) on 1 October 2017. Direct link to value.
  19. ^ RFC 854, Telnet Protocol Specification
  20. ^ Miriam Dunson, A Very Present Help: Psalm Studies for Older Adults. New York: Geneva Press (1999): 91. "Psalm 23 is perhaps the most familiar, the most loved, the most memorized, and the most quoted of all the psalms."
  21. ^ Living Religions: An Encyclopaedia of the World's Faiths, Mary Pat Fisher, 1997, page 338, I.B. Tauris Publishers,
  22. ^ Qur'an, Chapter 17, Verse 106
  23. ^ Quran, Chapter 97
  24. ^ Jarman, D. (1983). Alban Berg, Wilhelm Fliess and the Secret Programme of the Violin Concerto. The Musical Times Vol. 124, No. 1682 (Apr. 1983), pp. 218-223
  25. ^ Jarman, D. (1985). The Music of Alban Berg. Berkeley: University of California Press, pp. 228-230
  26. ^ "Nan Cross: Supported men resisting apartheid conscription", The Sunday Times (South Africa), 2007-07-22, accessed 2009-01-05.
  27. ^ "FREQUENTLY ASKED QUESTIONS (FAQS)". Dr Pepper/Seven Up, Inc. Retrieved 2 May 2019.

External links[edit]