18085238 has 4 divisors (see below), whose sum is σ = 27127860. Its totient is φ = 9042618.

The previous prime is 18085237. The next prime is 18085259. The reversal of 18085238 is 83258081.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 18085198 and 18085207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4521308 + ... + 4521311.

It is an arithmetic number, because the mean of its divisors is an integer number (6781965).

Almost surely, 2^18085238 is an apocalyptic number.

18085238 is a deficient number, since it is larger than the sum of its proper divisors (9042622).

18085238 is an equidigital number, since it uses as much as digits as its factorization.

18085238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9042621.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 18085238 is about 4252.6742174778. The cubic root of 18085238 is about 262.4871673243.

The spelling of 18085238 in words is "eighteen million, eighty-five thousand, two hundred thirty-eight".