Fatto generale: 20290 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20290 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20290 is an uninteresting number.
Data storica: July 20th is the day in 1960 that Ceylon (now Sri Lanka) elects Sirimavo Bandaranaike Prime Minister, the world's first elected female head of government.