Look up magic number in Wiktionary, the free dictionary.

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