Fait mathématique: 20648 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 20648 is an uninteresting number.
Date historique: July 12th is the day in 1917 that the Bisbee Deportation occurs as vigilantes kidnap and deport nearly 1,300 striking miners and others from Bisbee, Arizona.