18380252 has 12 divisors (see below), whose sum is σ = 35089656. Its totient is φ = 8354640.

The previous prime is 18380251. The next prime is 18380269. The reversal of 18380252 is 25208381.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380251) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 208823 + ... + 208910.

It is an arithmetic number, because the mean of its divisors is an integer number (2924138).

Almost surely, 2^18380252 is an apocalyptic number.

It is an amenable number.

18380252 is a deficient number, since it is larger than the sum of its proper divisors (16709404).

18380252 is a wasteful number, since it uses less digits than its factorization.

18380252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417748 (or 417746 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18380252 is about 4287.2196118230. The cubic root of 18380252 is about 263.9067431556.

The spelling of 18380252 in words is "eighteen million, three hundred eighty thousand, two hundred fifty-two".