How do you spell numbers to 20 in French?

In French, the numbers from 1 to 20 are spelled as follows: un (1), deux (2), trois (3), quatre (4), cinq (5), six (6), sept (7), huit (8), neuf (9), dix (10), onze (11), douze (12), treize (13), quatorze (14), quinze (15), seize (16), dix-sept (17), dix-huit (18), dix-neuf (19), and vingt (20). Each number has its own unique spelling, and they follow a consistent pattern for pronunciation.