Hecho general: 20687 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 20687 is an uninteresting number.
Trivia: 20687 is a boring number.
Fecha histórica: August 20th is the day in 1989 that the pleasure boat Marchioness sinks on the River Thames following a collision, 51 people are killed.