18180842792 has 24 divisors (see below), whose sum is σ = 39654645210. Its totient is φ = 7791789600.

The previous prime is 18180842791. The next prime is 18180842903. The reversal of 18180842792 is 29724808181.

It can be written as a sum of positive squares in only one way, i.e., 15243853156 + 2936989636 = 123466^2 + 54194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18180842792.

It is not an unprimeable number, because it can be changed into a prime (18180842791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23189459 + ... + 23190242.

Almost surely, 2^18180842792 is an apocalyptic number.

It is an amenable number.

18180842792 is an abundant number, since it is smaller than the sum of its proper divisors (21473802418).

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

18180842792 is a wasteful number, since it uses less digits than its factorization.

18180842792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46379721 (or 46379710 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 50.

The spelling of 18180842792 in words is "eighteen billion, one hundred eighty million, eight hundred forty-two thousand, seven hundred ninety-two".