18188046 has 24 divisors (see below), whose sum is σ = 40767480. Its totient is φ = 5853456.

The previous prime is 18188033. The next prime is 18188059. The reversal of 18188046 is 64088181.

It is an interprime number because it is at equal distance from previous prime (18188033) and next prime (18188059).

It is a self number, because there is not a number n which added to its sum of digits gives 18188046.

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 11 ways as a sum of consecutive naturals, for example, 16900 + ... + 17943.

It is an arithmetic number, because the mean of its divisors is an integer number (1698645).

Almost surely, 2^18188046 is an apocalyptic number.

18188046 is an abundant number, since it is smaller than the sum of its proper divisors (22579434).

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

18188046 is a wasteful number, since it uses less digits than its factorization.

18188046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34880 (or 34877 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 18188046 is about 4264.7445410013. The cubic root of 18188046 is about 262.9836091700.

The spelling of 18188046 in words is "eighteen million, one hundred eighty-eight thousand, forty-six".