18688538372 has 24 divisors (see below), whose sum is σ = 38172336384. Its totient is φ = 7838960832.

The previous prime is 18688538317. The next prime is 18688538459. The reversal of 18688538372 is 27383588681.

It is a super-2 number, since 2×18688538372² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7099193 + ... + 7101824.

It is an arithmetic number, because the mean of its divisors is an integer number (1590514016).

Almost surely, 2^18688538372 is an apocalyptic number.

It is an amenable number.

18688538372 is an abundant number, since it is smaller than the sum of its proper divisors (19483798012).

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

18688538372 is a wasteful number, since it uses less digits than its factorization.

18688538372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14201075 (or 14201073 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 59.

The spelling of 18688538372 in words is "eighteen billion, six hundred eighty-eight million, five hundred thirty-eight thousand, three hundred seventy-two".