Fatto generale: 19458 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 19458 is a boring number.
Trivia: 19458 is an unremarkable number.
Data storica: April 9th is the day in 1961 that the Pacific Electric Railway in Los Angeles, once the largest electric railway in the world, ends operations.