18505252 has 6 divisors (see below), whose sum is σ = 32384198. Its totient is φ = 9252624.

The previous prime is 18505243. The next prime is 18505283. The reversal of 18505252 is 25250581.

It can be written as a sum of positive squares in only one way, i.e., 13942756 + 4562496 = 3734^2 + 2136^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18505252.

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 as a sum of consecutive naturals, namely, 2313153 + ... + 2313160.

Almost surely, 2^18505252 is an apocalyptic number.

It is an amenable number.

18505252 is a deficient number, since it is larger than the sum of its proper divisors (13878946).

18505252 is a wasteful number, since it uses less digits than its factorization.

18505252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626317 (or 4626315 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 18505252 is about 4301.7731227948. The cubic root of 18505252 is about 264.5036490456.

The spelling of 18505252 in words is "eighteen million, five hundred five thousand, two hundred fifty-two".