18252238 has 8 divisors (see below), whose sum is σ = 27408960. Its totient is φ = 9115920.

The previous prime is 18252197. The next prime is 18252277. The reversal of 18252238 is 83225281.

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 2623 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (3426120).

Almost surely, 2^18252238 is an apocalyptic number.

18252238 is a deficient number, since it is larger than the sum of its proper divisors (9156722).

18252238 is an equidigital number, since it uses as much as digits as its factorization.

18252238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202.

The product of its digits is 7680, while the sum is 31.

The square root of 18252238 is about 4272.2638027163. The cubic root of 18252238 is about 263.2926330660.

The spelling of 18252238 in words is "eighteen million, two hundred fifty-two thousand, two hundred thirty-eight".