21920313676 has 12 divisors (see below), whose sum is σ = 38595890872. Its totient is φ = 10892916288.

The previous prime is 21920313659. The next prime is 21920313697. The reversal of 21920313676 is 67631302912.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16809405 + ... + 16810708.

Almost surely, 2^21920313676 is an apocalyptic number.

It is an amenable number.

21920313676 is a deficient number, since it is larger than the sum of its proper divisors (16675577196).

21920313676 is a wasteful number, since it uses less digits than its factorization.

21920313676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33620280 (or 33620278 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 21920313676 in words is "twenty-one billion, nine hundred twenty million, three hundred thirteen thousand, six hundred seventy-six".