Fatto generale: 21424 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21424 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21424 is an uninteresting number.
Data storica: August 27th is the day in 1985 that the Nigerian government is peacefully overthrown by Army Chief of Staff Major General Ibrahim Babangida.