20956158528 has 56 divisors (see below), whose sum is σ = 58364749920. Its totient is φ = 6617733120.

The previous prime is 20956158523. The next prime is 20956158541. The reversal of 20956158528 is 82585165902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20956158523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2868633 + ... + 2875928.

Almost surely, 2^20956158528 is an apocalyptic number.

It is an amenable number.

20956158528 is an abundant number, since it is smaller than the sum of its proper divisors (37408591392).

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

20956158528 is a wasteful number, since it uses less digits than its factorization.

20956158528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744595 (or 5744585 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 51.

The spelling of 20956158528 in words is "twenty billion, nine hundred fifty-six million, one hundred fifty-eight thousand, five hundred twenty-eight".