How to spell 20 20 is spelled twenty in English. Hear it & practice → On a check To write $20.00 on a check, the words line reads: Twenty and 00/100 Full check-writing guide → Related numbers2 two 30 thirty 1 one 10 ten 100 one hundred 1,000 one thousand Spelling guidesMoney amountsHow to write dollars in words.Writing a checkStep-by-step for US checks.Ordinals (1st, 2nd…)First, second, third, and beyond.All guidesDates, phones, fractions, decimals… ← 19All numbers21 →