Hecho general: 20722 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 20722 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20722 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: September 24th is the day in 1906 that U.S. President Theodore Roosevelt proclaims Devils Tower in Wyoming as the nation's first National Monument.