Fatto matematico: 1418 is the number of (not necessarily distinct) sets of Egyptian fractions that sum to 1 with smallest fraction 1/18.
Trivia: 1418 is a boring number.
Data storica: November 18th is the day in 1421 that a seawall at the Zuiderzee dike in the Netherlands breaks, flooding 72 villages and killing about 10,000 people.