Fatto matematico: 21393 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21393 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: 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.