Fatto generale: 19920 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 19920 is an uninteresting number.
Trivia: 19920 is an unremarkable number.
Data storica: July 15th is the day in 1955 that Eighteen Nobel laureates sign the Mainau Declaration against nuclear weapons, later co-signed by thirty-four others.