Fatto generale: 20881 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20881 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20881 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: March 2nd is the day in 1998 that Data sent from the Galileo spacecraft indicates that Jupiter's moon Europa has a liquid ocean under a thick crust of ice.