This is the 7474th most frequent Russian word.
двадцать
Twenty.
Here, 'двадцать' functions as a numeral denoting someone's age.
Ему исполнилось двадцать лет.
He turned twenty years old.
In this sentence, 'двадцать' indicates the number of minutes in the context of time.
В двадцать минут девятого мы выйдем.
At twenty minutes past eight, we will leave.
The word 'двадцать' is used as a cardinal number to indicate the quantity of stalls.