it is infinite. the most zeros in a number that we know today would have to be a hundred zeros. that number is called a google.
it is in the millions
octillion
sextillion
Trillion
nonevsextillionocteillion
2*1020 this is called 200quintillion a quintillion is a number with 18 zeros a sextillion is a number with 21 zeros your number has 20 zeros therefore it is not quite a sextillion yet.
ten's of billions
One billion
The number that has 15 zeroes is called quadrillion.
100 quindecillion