Hecho general: 20890 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 20890 is an unremarkable number.
Trivia: 20890 is a boring number.
Fecha histórica: March 11th is the day in 1993 that Janet Reno is confirmed by the United States Senate and sworn in the next day, becoming the first female Attorney General of the United States.