Fatto generale: 21469 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21469 is a boring number.
Trivia: 21469 is a boring number.
Data storica: October 11th is the day in 1982 that the Mary Rose, a Tudor carrack which sank on July 19, 1545, is salvaged from the sea bed of the Solent, off Portsmouth.