18368956 has 12 divisors (see below), whose sum is σ = 32291392. Its totient is φ = 9142848.

The previous prime is 18368947. The next prime is 18368981. The reversal of 18368956 is 65986381.

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 3 ways as a sum of consecutive naturals, for example, 9405 + ... + 11188.

Almost surely, 2^18368956 is an apocalyptic number.

It is an amenable number.

18368956 is a deficient number, since it is larger than the sum of its proper divisors (13922436).

18368956 is a wasteful number, since it uses less digits than its factorization.

18368956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20820 (or 20818 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 18368956 is about 4285.9020054126. The cubic root of 18368956 is about 263.8526687886.

The spelling of 18368956 in words is "eighteen million, three hundred sixty-eight thousand, nine hundred fifty-six".