0-zero 1-one 2-two 3-three 4-four 5-five 6-six 7-seven 8-eight 9-nine 10-ten 11-eleven 12-twelve 13-thirteen 14-fourteen 15-fifteen 16-sixteen 17-seventeen 18-eighteen 19-nineteen 20-twenty 30-thirty 100-one hundred 101-one hundred one 200-two hundred 1000-one thousand 1000000-one million