Hecho general: 20191 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 20191 is an unremarkable number.
Trivia: 20191 is an uninteresting number.
Fecha histórica: April 12th is the day in 1934 that the strongest surface wind gust in the world at 231 mph, is measured on the summit of Mount Washington, New Hampshire.