18631690968 has 32 divisors (see below), whose sum is σ = 50813703360. Its totient is φ = 5645966880.

The previous prime is 18631690949. The next prime is 18631690969. The reversal of 18631690968 is 86909613681.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18631690969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35287030 + ... + 35287557.

It is an arithmetic number, because the mean of its divisors is an integer number (1587928230).

Almost surely, 2^18631690968 is an apocalyptic number.

It is an amenable number.

18631690968 is an abundant number, since it is smaller than the sum of its proper divisors (32182012392).

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

18631690968 is a wasteful number, since it uses less digits than its factorization.

18631690968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70574607 (or 70574603 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 18631690968 in words is "eighteen billion, six hundred thirty-one million, six hundred ninety thousand, nine hundred sixty-eight".