18386956 has 18 divisors (see below), whose sum is σ = 37430988. Its totient is φ = 7880040.

The previous prime is 18386947. The next prime is 18386969. The reversal of 18386956 is 65968381.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46710 + ... + 47101.

Almost surely, 2^18386956 is an apocalyptic number.

It is an amenable number.

18386956 is an abundant number, since it is smaller than the sum of its proper divisors (19044032).

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

18386956 is a wasteful number, since it uses less digits than its factorization.

18386956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93829 (or 93820 counting only the distinct ones).

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

The square root of 18386956 is about 4288.0013992535. The cubic root of 18386956 is about 263.9388249745.

The spelling of 18386956 in words is "eighteen million, three hundred eighty-six thousand, nine hundred fifty-six".