20963118956 has 18 divisors (see below), whose sum is σ = 39724491492. Its totient is φ = 9675285360.

The previous prime is 20963118853. The next prime is 20963119019. The reversal of 20963118956 is 65981136902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15504590 + ... + 15505941.

It is an arithmetic number, because the mean of its divisors is an integer number (2206916194).

Almost surely, 2^20963118956 is an apocalyptic number.

20963118956 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20963118956 is a deficient number, since it is larger than the sum of its proper divisors (18761372536).

20963118956 is a wasteful number, since it uses less digits than its factorization.

20963118956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31010561 (or 31010546 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 20963118956 in words is "twenty billion, nine hundred sixty-three million, one hundred eighteen thousand, nine hundred fifty-six".