Hecho matemático: 61820 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 61820 is an unremarkable number.
Fecha histórica: April 3rd is the day in 1888 that the first of 11 unsolved brutal murders of women committed in or near the impoverished Whitechapel district in the East End of London, occurs.