18115252 has 6 divisors (see below), whose sum is σ = 31701698. Its totient is φ = 9057624.

The previous prime is 18115243. The next prime is 18115261. The reversal of 18115252 is 25251181.

It is an interprime number because it is at equal distance from previous prime (18115243) and next prime (18115261).

It can be written as a sum of positive squares in only one way, i.e., 15792676 + 2322576 = 3974^2 + 1524^2 .

It is a congruent number.

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, 2264403 + ... + 2264410.

Almost surely, 2^18115252 is an apocalyptic number.

It is an amenable number.

18115252 is a deficient number, since it is larger than the sum of its proper divisors (13586446).

18115252 is a wasteful number, since it uses less digits than its factorization.

18115252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528817 (or 4528815 counting only the distinct ones).

The product of its digits is 800, while the sum is 25.

The square root of 18115252 is about 4256.2015929700. The cubic root of 18115252 is about 262.6322937090.

The spelling of 18115252 in words is "eighteen million, one hundred fifteen thousand, two hundred fifty-two".