18115974 has 20 divisors (see below), whose sum is σ = 40593564. Its totient is φ = 6038604.

The previous prime is 18115969. The next prime is 18115991. The reversal of 18115974 is 47951181.

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 55752 + ... + 56075.

Almost surely, 2^18115974 is an apocalyptic number.

18115974 is an abundant number, since it is smaller than the sum of its proper divisors (22477590).

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

18115974 is a wasteful number, since it uses less digits than its factorization.

18115974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111841 (or 111832 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 18115974 is about 4256.2864095359. The cubic root of 18115974 is about 262.6357828130.

The spelling of 18115974 in words is "eighteen million, one hundred fifteen thousand, nine hundred seventy-four".