21089021922 has 32 divisors (see below), whose sum is σ = 47748735360. Its totient is φ = 6897037680.

The previous prime is 21089021893. The next prime is 21089021923. The reversal of 21089021922 is 22912098012.

It is not an unprimeable number, because it can be changed into a prime (21089021923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3681454 + ... + 3687177.

It is an arithmetic number, because the mean of its divisors is an integer number (1492147980).

Almost surely, 2^21089021922 is an apocalyptic number.

21089021922 is an abundant number, since it is smaller than the sum of its proper divisors (26659713438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21089021922 is a wasteful number, since it uses less digits than its factorization.

21089021922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7368695 (or 7368689 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 21089021922 in words is "twenty-one billion, eighty-nine million, twenty-one thousand, nine hundred twenty-two".