18257038 has 8 divisors (see below), whose sum is σ = 27409032. Its totient is φ = 9120696.

The previous prime is 18257027. The next prime is 18257039. The reversal of 18257038 is 83075281.

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

It is a super-4 number, since 4×18257038⁴ (a number of 30 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18256994 and 18257012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18257039) by changing a digit.

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, 345 + ... + 6052.

It is an arithmetic number, because the mean of its divisors is an integer number (3426129).

Almost surely, 2^18257038 is an apocalyptic number.

18257038 is a deficient number, since it is larger than the sum of its proper divisors (9151994).

18257038 is a wasteful number, since it uses less digits than its factorization.

18257038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 18257038 is about 4272.8255288509. The cubic root of 18257038 is about 263.3157114025.

The spelling of 18257038 in words is "eighteen million, two hundred fifty-seven thousand, thirty-eight".