Fait général: 20138 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 20138 is an uninteresting number.
Culture générale: 20138 is an unremarkable number.
Date historique: February 18th is the day in 1478 that George, Duke of Clarence, convicted of treason against his older brother Edward IV of England, is executed in private at the Tower of London.