18158242 has 8 divisors (see below), whose sum is σ = 27565776. Its totient is φ = 8969652.

The previous prime is 18158237. The next prime is 18158317. The reversal of 18158242 is 24285181.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54528 + ... + 54859.

It is an arithmetic number, because the mean of its divisors is an integer number (3445722).

Almost surely, 2^18158242 is an apocalyptic number.

18158242 is a deficient number, since it is larger than the sum of its proper divisors (9407534).

18158242 is a wasteful number, since it uses less digits than its factorization.

18158242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109472.

The product of its digits is 5120, while the sum is 31.

The square root of 18158242 is about 4261.2488779699. The cubic root of 18158242 is about 262.8398838418.

The spelling of 18158242 in words is "eighteen million, one hundred fifty-eight thousand, two hundred forty-two".