Fatto generale: 21563 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21563 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21563 is a boring number.
Data storica: January 13th is the day in 1972 that Prime Minister Kofi Abrefa Busia and President Edward Akufo-Addo of Ghana are ousted in a bloodless military coup by Colonel Ignatius Kutu Acheampong.