18158142 has 16 divisors (see below), whose sum is σ = 38452752. Its totient is φ = 5696640.

The previous prime is 18158137. The next prime is 18158191. The reversal of 18158142 is 24185181.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 88909 + ... + 89112.

It is an arithmetic number, because the mean of its divisors is an integer number (2403297).

Almost surely, 2^18158142 is an apocalyptic number.

18158142 is an abundant number, since it is smaller than the sum of its proper divisors (20294610).

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

18158142 is a wasteful number, since it uses less digits than its factorization.

18158142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178043.

The product of its digits is 2560, while the sum is 30.

The square root of 18158142 is about 4261.2371443045. The cubic root of 18158142 is about 262.8394013422.

The spelling of 18158142 in words is "eighteen million, one hundred fifty-eight thousand, one hundred forty-two".