Fait général: 20548 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20548 is an uninteresting number.
Culture générale: 20548 is a boring number.
Date historique: April 3rd is the day in 1936 that Bruno Richard Hauptmann is executed for the kidnapping and death of Charles Augustus Lindbergh, Jr., the baby son of pilot Charles Lindbergh.