20102646636 has 96 divisors (see below), whose sum is σ = 52404979200. Its totient is φ = 6664109760.

The previous prime is 20102646617. The next prime is 20102646643. The reversal of 20102646636 is 63664620102.

20102646636 is a `hidden beast` number, since 2 + 0 + 1 + 0 + 2 + 646 + 6 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20102646636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27055681 + ... + 27056423.

It is an arithmetic number, because the mean of its divisors is an integer number (545885200).

Almost surely, 2^20102646636 is an apocalyptic number.

It is an amenable number.

20102646636 is an abundant number, since it is smaller than the sum of its proper divisors (32302332564).

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

20102646636 is a wasteful number, since it uses less digits than its factorization.

20102646636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 20102646636 in words is "twenty billion, one hundred two million, six hundred forty-six thousand, six hundred thirty-six".