Fatto generale: 84820 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 84820 is an unremarkable number.
Trivia: 84820 is an uninteresting number.
Data storica: March 24th is the day in 1933 that the Enabling Act of 1933 is passed by the German Reichstag, allowing Adolf Hitler to gain plenary power.