20500968918 has 32 divisors (see below), whose sum is σ = 42393415680. Its totient is φ = 6602460480.

The previous prime is 20500968913. The next prime is 20500968947. The reversal of 20500968918 is 81986900502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500968913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25443 + ... + 204081.

It is an arithmetic number, because the mean of its divisors is an integer number (1324794240).

Almost surely, 2^20500968918 is an apocalyptic number.

20500968918 is an abundant number, since it is smaller than the sum of its proper divisors (21892446762).

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

20500968918 is a wasteful number, since it uses less digits than its factorization.

20500968918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179292.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 20500968918 in words is "twenty billion, five hundred million, nine hundred sixty-eight thousand, nine hundred eighteen".