Fatto generale: 20807 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20807 is a boring number.
Trivia: 20807 is an uninteresting number.
Data storica: December 18th is the day in 1793 that Surrender of the frigate La Lutine by French Royalists to Lord Hood; renamed HMS Lutine, she later becomes a famous treasure wreck.