18000186 has 16 divisors (see below), whose sum is σ = 36276768. Its totient is φ = 5954000.

The previous prime is 18000149. The next prime is 18000209. The reversal of 18000186 is 68100081.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 7 ways as a sum of consecutive naturals, for example, 10665 + ... + 12236.

It is an arithmetic number, because the mean of its divisors is an integer number (2267298).

Almost surely, 2^18000186 is an apocalyptic number.

18000186 is an abundant number, since it is smaller than the sum of its proper divisors (18276582).

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

18000186 is a wasteful number, since it uses less digits than its factorization.

18000186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23037.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 18000186 is about 4242.6626073729. The cubic root of 18000186 is about 262.0750421176.

The spelling of 18000186 in words is "eighteen million, one hundred eighty-six", and thus it is an aban number.