Fatto generale: 19996 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 19996 is an uninteresting number.
Trivia: 19996 is an uninteresting number.
Data storica: September 29th is the day in 1979 that Pope John Paul II becomes the first pope to set foot on Irish soil with his pastoral visit to the Republic of Ireland.