Magic number

• 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

• 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
• The Magic Numbers (album), the debut album by the band
• Magic Numbers or Hannah Fry's Magic Numbers, a 2018 series of episodes about Mathematics, presented by Hannah Fry.

• 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

• "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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