Fatto generale: 20854 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20854 is an unremarkable number.
Trivia: 20854 is an uninteresting number.
Data storica: February 3rd is the day in 1966 that the unmanned Soviet Luna 9 spacecraft makes the first controlled rocket-assisted landing on the Moon.