Fatto matematico: 4493 is the number of ways to divide a 11×11 grid of points into two sets using a straight line.
Trivia: 4493 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: April 19th is the day in 1892 that Charles Duryea claims to have driven the first automobile in the United States, in Springfield, Massachusetts.