18318651832 has 16 divisors (see below), whose sum is σ = 36989585640. Its totient is φ = 8454762336.

The previous prime is 18318651817. The next prime is 18318651833. The reversal of 18318651832 is 23815681381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18318651833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88070338 + ... + 88070545.

Almost surely, 2^18318651832 is an apocalyptic number.

It is an amenable number.

18318651832 is an abundant number, since it is smaller than the sum of its proper divisors (18670933808).

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

18318651832 is a wasteful number, since it uses less digits than its factorization.

18318651832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176140902 (or 176140898 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The spelling of 18318651832 in words is "eighteen billion, three hundred eighteen million, six hundred fifty-one thousand, eight hundred thirty-two".