General fact: 20852 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 20852 is an uninteresting number.
Trivia: 20852 is an unremarkable number.
Historical date: February 1st is the day in 1713 that the Kalabalik or Tumult in Bendery results from the Ottoman sultan's order that his unwelcome guest, King Charles XII of Sweden, be seized.