20357838636 has 24 divisors (see below), whose sum is σ = 47504331504. Its totient is φ = 6785559360.

The previous prime is 20357838617. The next prime is 20357838661. The reversal of 20357838636 is 63683875302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239406 + ... + 313098.

It is an arithmetic number, because the mean of its divisors is an integer number (1979347146).

Almost surely, 2^20357838636 is an apocalyptic number.

It is an amenable number.

20357838636 is an abundant number, since it is smaller than the sum of its proper divisors (27146492868).

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

20357838636 is a wasteful number, since it uses less digits than its factorization.

20357838636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96721 (or 96719 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 20357838636 in words is "twenty billion, three hundred fifty-seven million, eight hundred thirty-eight thousand, six hundred thirty-six".