Fait général: 20524 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20524 is an unremarkable number.
Culture générale: 20524 is a boring number.
Date historique: March 10th is the day in 1933 that an earthquake in Long Beach, California kills 115 people and causes an estimated $40 million dollars in damage.