18257142 has 8 divisors (see below), whose sum is σ = 36514296. Its totient is φ = 6085712.

The previous prime is 18257131. The next prime is 18257159. The reversal of 18257142 is 24175281.

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

18257142 is an admirable number.

It is a super-4 number, since 4×18257142⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521423 + ... + 1521434.

It is an arithmetic number, because the mean of its divisors is an integer number (4564287).

Almost surely, 2^18257142 is an apocalyptic number.

18257142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18257142 is a wasteful number, since it uses less digits than its factorization.

18257142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042862.

The product of its digits is 4480, while the sum is 30.

The square root of 18257142 is about 4272.8376987665. The cubic root of 18257142 is about 263.3162113883.

The spelling of 18257142 in words is "eighteen million, two hundred fifty-seven thousand, one hundred forty-two".