Fatto generale: 20768 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20768 is an unremarkable number.
Trivia: 20768 is an unremarkable number.
Data storica: November 9th is the day in 1918 that Kaiser Wilhelm II of Germany abdicates after the German Revolution, and Germany is proclaimed a Republic.