Hecho general: 21434 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 21434 is an unremarkable number.
Trivia: 21434 is an uninteresting number.
Fecha histórica: September 6th is the day in 1949 that Allied military authorities relinquish control of former Nazi Germany assets back to German control.