Magic number

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