18381150 has 36 divisors (see below), whose sum is σ = 49385232. Its totient is φ = 4901520.

The previous prime is 18381149. The next prime is 18381173. The reversal of 18381150 is 5118381.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19974 + ... + 20873.

It is an arithmetic number, because the mean of its divisors is an integer number (1371812).

Almost surely, 2^18381150 is an apocalyptic number.

18381150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18381150 is an abundant number, since it is smaller than the sum of its proper divisors (31004082).

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

18381150 is a wasteful number, since it uses less digits than its factorization.

18381150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40865 (or 40857 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 18381150 is about 4287.3243404249. The cubic root of 18381150 is about 263.9110409638.

The spelling of 18381150 in words is "eighteen million, three hundred eighty-one thousand, one hundred fifty".