Fatto generale: 21515 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21515 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21515 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 26th is the day in 1789 that a national Thanksgiving Day is observed in the United States as recommended by President George Washington and approved by Congress.