Fatto generale: 20864 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 20864 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 20864 is a boring number.
Data storica: February 13th is the day in 2004 that the Harvard-Smithsonian Center for Astrophysics announces the discovery of the universe's largest known diamond, white dwarf star BPM 37093.