Hecho general: 24420 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 24420 is an uninteresting number.
Trivia: 24420 is a boring number.
Fecha histórica: November 9th is the day in 1918 that Kaiser Wilhelm II of Germany abdicates after the German Revolution, and Germany is proclaimed a Republic.