Hecho general: 20829 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 20829 is a boring number.
Trivia: 20829 is a boring number.
Fecha histórica: January 9th is the day in 1861 that Mississippi becomes the second state to secede from the Union before the outbreak of the American Civil War.