20957882028 has 24 divisors (see below), whose sum is σ = 50223394032. Its totient is φ = 6797150784.

The previous prime is 20957882009. The next prime is 20957882039. The reversal of 20957882028 is 82028875902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23600775 + ... + 23601662.

It is an arithmetic number, because the mean of its divisors is an integer number (2092641418).

Almost surely, 2^20957882028 is an apocalyptic number.

It is an amenable number.

20957882028 is an abundant number, since it is smaller than the sum of its proper divisors (29265512004).

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

20957882028 is a wasteful number, since it uses less digits than its factorization.

20957882028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47202481 (or 47202479 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 20957882028 in words is "twenty billion, nine hundred fifty-seven million, eight hundred eighty-two thousand, twenty-eight".