Magic number may refer to:
Science and technology
- Magic number (chemistry), number of atoms or molecules forming an exceptionally stable cluster
- Magic number (physics), the number of nucleons that results in completely filled nuclear shells
- Magic number (programming), either a unique identifier or a literal with unexplained meaning
Arts and entertainment
- Magic Numbers (game show), British 2010 television game show
- Magic Number (game), a pricing game on The Price is Right
- "Magic Number" (song), a song by Maaya Sakamoto
- "The Magic Number", a 1990 song by De La Soul from 3 Feet High and Rising
- The Magic Numbers, a British rock band
- Magic Numbers or Hannah Fry's Magic Numbers, a 2018 series of episodes about Mathematics, presented by Hannah Fry.
Other uses
- Magic number (sports), a number that indicates how close a team is to winning a season title
- Magic number (oil), the price per barrel of oil at which an oil exporting nation runs a deficit
See also
- "The Magical Number Seven, Plus or Minus Two", a 1956 paper by George Miller
- Magic constant, the sum in a magic square
- Numerology, the belief that numbers can have magic properties
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