Fatto matematico: 20765 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20765 is an unremarkable number.
Data storica: November 6th is the day in 1995 that the Rova of Antananarivo, home of the sovereigns of Madagascar from the 16th to 19th centuries, is destroyed by fire.