Hecho general: 20975 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 20975 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20975 is a boring number.
Fecha histórica: June 4th is the day in 1989 that Ali Khamenei is elected the new Supreme Leader of Islamic republic of Iran by the Assembly of Experts after the death of Ayatollah Ruhollah Khomeini.