Los números: 16 - 20

16 = dieciséis*

17 = dieciocho

19 = diecinueve

20 = veinte

*Note: number 16 has an accent!

Note: dieciséis, diecisiete, dieciocho and diecinueve are contracted forms of "diez y seis" (ten and six), "diez y siete" (ten and seven), "diez y ocho" (ten and eight) and "diez y nueve" (ten and nine).