20955631884 has 48 divisors (see below), whose sum is σ = 55180984320. Its totient is φ = 6131218240.

The previous prime is 20955631871. The next prime is 20955631897. The reversal of 20955631884 is 48813655902.

It is an interprime number because it is at equal distance from previous prime (20955631871) and next prime (20955631897).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2733324 + ... + 2740979.

It is an arithmetic number, because the mean of its divisors is an integer number (1149603840).

Almost surely, 2^20955631884 is an apocalyptic number.

It is an amenable number.

20955631884 is an abundant number, since it is smaller than the sum of its proper divisors (34225352436).

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

20955631884 is a wasteful number, since it uses less digits than its factorization.

20955631884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474350 (or 5474348 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 20955631884 in words is "twenty billion, nine hundred fifty-five million, six hundred thirty-one thousand, eight hundred eighty-four".