How do you say 20000000000000000000000000 mathematically correct?

million: six zeroes

billion: nine zeroes

trillion: twelve zeroes

quadrillion: fifteen zeroes

quintillion: eighteen zeroes

sextillion: twenty-one zeroes

septillion: twenty-four zeroes

octillion: twenty-seven zeroes

novillion: thirty zeroes

decillion: thirty-three zeroes

undecillion: thirty-six zeroes

duodecillion: thirty-nine zeroes

tredecillion: forty-two zeroes

quattuordecillion: forty-five zeroes

quindecillion: forty-eight zeroes

sexdecillion: fifty-one zeroes

septendecillion: fifty-four zeroes

octodecillion: fifty-seven zeroes

novemdecillion: sixty zeroes

vigintillion: sixty-three zeroes

your number is two quadrillion