Fatto matematico: 21045 is an uninteresting number.
Trivia: 21045 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 13th is the day in 1968 that Alexandros Panagoulis attempts to assassinate the Greek dictator Colonel Georgios Papadopoulos in Varkiza, Athens.