20534637108 has 24 divisors (see below), whose sum is σ = 47916590848. Its totient is φ = 6844530816.

The previous prime is 20534637089. The next prime is 20534637191. The reversal of 20534637108 is 80173643502.

It is a congruent number.

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, 331260 + ... + 388332.

Almost surely, 2^20534637108 is an apocalyptic number.

It is an amenable number.

20534637108 is an abundant number, since it is smaller than the sum of its proper divisors (27381953740).

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

20534637108 is a wasteful number, since it uses less digits than its factorization.

20534637108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87063 (or 87061 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 20534637108 in words is "twenty billion, five hundred thirty-four million, six hundred thirty-seven thousand, one hundred eight".