Hecho general: 20311 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 20311 is an unremarkable number.
Trivia: 20311 is an unremarkable number.
Fecha histórica: August 10th is the day in 1846 that the Smithsonian Institution is chartered by the United States Congress after James Smithson donates $500,000.