20965953976 has 32 divisors (see below), whose sum is σ = 44268295680. Its totient is φ = 9222559200.

The previous prime is 20965953937. The next prime is 20965954103. The reversal of 20965953976 is 67935956902.

It is a super-2 number, since 2×20965953976² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3840006 + ... + 3845461.

It is an arithmetic number, because the mean of its divisors is an integer number (1383384240).

Almost surely, 2^20965953976 is an apocalyptic number.

It is an amenable number.

20965953976 is an abundant number, since it is smaller than the sum of its proper divisors (23302341704).

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

20965953976 is a wasteful number, since it uses less digits than its factorization.

20965953976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685515 (or 7685511 counting only the distinct ones).

The product of its (nonzero) digits is 27556200, while the sum is 61.

The spelling of 20965953976 in words is "twenty billion, nine hundred sixty-five million, nine hundred fifty-three thousand, nine hundred seventy-six".