Números cardinales
1 = one 21 = twenty-one
2 = two 30 = thirty
3 = three 31 = thirty-one
4 = four 40 = forty
5 = five 50 = fifty
6 = six 60 = sixty
7 = seven 70 = seventy
8 = eight 80 = eighty
9 = nine 90 = ninety
10 = ten 100 = one hundred
11 = eleven 101 = one hundred and one
12 = twelve 200 = two hundred
13 = thirteen 256 = two hundred fifty-six
14 = fourteen 300 = three hundred
15 = fifteen 400 = four hundred
16 = sixteen 1000 = one thousand
17 = seventeen 10000 = ten thousand
18 = eighteen 100000 = (one) hundred thousand
19 = nineteen 1000000 = (one) million
20 = twenty 1000000000 = (one) thousand million (BE)
one billion (AE)