20908366976 has 32 divisors (see below), whose sum is σ = 47603873280. Its totient is φ = 8960728320.

The previous prime is 20908366957. The next prime is 20908366979. The reversal of 20908366976 is 67966380902.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is not an unprimeable number, because it can be changed into a prime (20908366979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11666720 + ... + 11668511.

It is an arithmetic number, because the mean of its divisors is an integer number (1487621040).

Almost surely, 2^20908366976 is an apocalyptic number.

It is an amenable number.

20908366976 is an abundant number, since it is smaller than the sum of its proper divisors (26695506304).

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

20908366976 is an equidigital number, since it uses as much as digits as its factorization.

20908366976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23335252 (or 23335240 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 20908366976 in words is "twenty billion, nine hundred eight million, three hundred sixty-six thousand, nine hundred seventy-six".