18185252 has 12 divisors (see below), whose sum is σ = 32139996. Its totient is φ = 9002400.

The previous prime is 18185221. The next prime is 18185273. The reversal of 18185252 is 25258181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8797156 + 9388096 = 2966^2 + 3064^2 .

It is an alternating number because its digits alternate between odd and even.

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, 22103 + ... + 22910.

It is an arithmetic number, because the mean of its divisors is an integer number (2678333).

Almost surely, 2^18185252 is an apocalyptic number.

It is an amenable number.

18185252 is a deficient number, since it is larger than the sum of its proper divisors (13954744).

18185252 is a wasteful number, since it uses less digits than its factorization.

18185252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45118 (or 45116 counting only the distinct ones).

The product of its digits is 6400, while the sum is 32.

The square root of 18185252 is about 4264.4169589758. The cubic root of 18185252 is about 262.9701421959.

The spelling of 18185252 in words is "eighteen million, one hundred eighty-five thousand, two hundred fifty-two".