18115372 has 24 divisors (see below), whose sum is σ = 35778960. Its totient is φ = 7949760.

The previous prime is 18115367. The next prime is 18115381. The reversal of 18115372 is 27351181.

It is a self number, because there is not a number n which added to its sum of digits gives 18115372.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5823 + ... + 8374.

It is an arithmetic number, because the mean of its divisors is an integer number (1490790).

Almost surely, 2^18115372 is an apocalyptic number.

It is an amenable number.

18115372 is a deficient number, since it is larger than the sum of its proper divisors (17663588).

18115372 is a wasteful number, since it uses less digits than its factorization.

18115372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14241 (or 14239 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 18115372 is about 4256.2156900232. The cubic root of 18115372 is about 262.6328736219.

The spelling of 18115372 in words is "eighteen million, one hundred fifteen thousand, three hundred seventy-two".