20631986124 has 24 divisors (see below), whose sum is σ = 48567333360. Its totient is φ = 6816466944.

The previous prime is 20631986119. The next prime is 20631986147. The reversal of 20631986124 is 42168913602.

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, 7606309 + ... + 7609020.

It is an arithmetic number, because the mean of its divisors is an integer number (2023638890).

Almost surely, 2^20631986124 is an apocalyptic number.

It is an amenable number.

20631986124 is an abundant number, since it is smaller than the sum of its proper divisors (27935347236).

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

20631986124 is a wasteful number, since it uses less digits than its factorization.

20631986124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15215449 (or 15215447 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 20631986124 in words is "twenty billion, six hundred thirty-one million, nine hundred eighty-six thousand, one hundred twenty-four".