Fait général: 17820 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 17820 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 17820 is an unremarkable number.
Date historique: October 14th is the day in 1968 that the first live telecast from a manned spacecraft, the Apollo 7, launched by the National Aeronautics and Space Administration of the U.S.A.