Hecho matemático: 17647 is an uninteresting number.
Trivia: 17647 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: April 24th is the day in 1918 that First tank-to-tank combat, at Villers-Bretonneux, France, when three British Mark IVs met three German A7Vs.