Fatto generale: 20452 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20452 is an unremarkable number.
Trivia: 20452 is an uninteresting number.
Data storica: December 29th is the day in 1914 that a Portrait of the Artist as a Young Man, the first novel by James Joyce, is serialised in The Egoist.