Fatto generale: 20879 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20879 is an uninteresting number.
Trivia: 20879 is an unremarkable number.
Data storica: February 28th is the day in 1914 that the Autonomous Republic of Northern Epirus is proclaimed in Gjirokastër, by the Greeks living in southern Albania.