20970391364 has 48 divisors (see below), whose sum is σ = 40020785280. Its totient is φ = 9613936800.

The previous prime is 20970391363. The next prime is 20970391369. The reversal of 20970391364 is 46319307902.

It is not an unprimeable number, because it can be changed into a prime (20970391363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1319087 + ... + 1334889.

It is an arithmetic number, because the mean of its divisors is an integer number (833766360).

Almost surely, 2^20970391364 is an apocalyptic number.

It is an amenable number.

20970391364 is a deficient number, since it is larger than the sum of its proper divisors (19050393916).

20970391364 is a wasteful number, since it uses less digits than its factorization.

20970391364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15997 (or 15969 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 44.

The spelling of 20970391364 in words is "twenty billion, nine hundred seventy million, three hundred ninety-one thousand, three hundred sixty-four".