Fait général: 21028 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21028 is an uninteresting number.
Culture générale: 21028 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: July 27th is the day in 1054 that Siward, Earl of Northumbria invades Scotland and defeats Macbeth, King of Scotland somewhere north of the Firth of Forth.