Fatto matematico: 9020 is the number of ways to color the vertices of a triangle with 30 colors, up to rotation.
Trivia: 9020 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: September 10th is the day in 1972 that the United States suffers its first loss of an international basketball game in a disputed match against the Soviet Union at Munich, Germany.