Hecho matemático: 21946 is an uninteresting number.
Trivia: 21946 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: January 31st is the day in 1900 that Datu Muhammad Salleh is assassinated in Kampung Teboh, Tambunan, ending the Mat Salleh Rebellion.