18504252 has 72 divisors (see below), whose sum is σ = 53049360. Its totient is φ = 5391360.

The previous prime is 18504223. The next prime is 18504287. The reversal of 18504252 is 25240581.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7852 + ... + 9932.

Almost surely, 2^18504252 is an apocalyptic number.

18504252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18504252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26524680).

18504252 is an abundant number, since it is smaller than the sum of its proper divisors (34545108).

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

18504252 is a wasteful number, since it uses less digits than its factorization.

18504252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 18504252 is about 4301.6568900832. The cubic root of 18504252 is about 264.4988844809.

The spelling of 18504252 in words is "eighteen million, five hundred four thousand, two hundred fifty-two".