18157119 has 4 divisors (see below), whose sum is σ = 24209496. Its totient is φ = 12104744.

The previous prime is 18157109. The next prime is 18157133. The reversal of 18157119 is 91175181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18157119 is a prime.

It is a super-2 number, since 2×18157119² = 659361940760322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18157119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18157109) by changing a digit.

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, 3026184 + ... + 3026189.

It is an arithmetic number, because the mean of its divisors is an integer number (6052374).

Almost surely, 2^18157119 is an apocalyptic number.

18157119 is a deficient number, since it is larger than the sum of its proper divisors (6052377).

18157119 is an equidigital number, since it uses as much as digits as its factorization.

18157119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6052376.

The product of its digits is 2520, while the sum is 33.

The square root of 18157119 is about 4261.1171070507. The cubic root of 18157119 is about 262.8344652689.

The spelling of 18157119 in words is "eighteen million, one hundred fifty-seven thousand, one hundred nineteen".