18157927 has 2 divisors, whose sum is σ = 18157928. Its totient is φ = 18157926.

The previous prime is 18157891. The next prime is 18157943. The reversal of 18157927 is 72975181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18157927 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18157927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18155927) 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 as a sum of consecutive naturals, namely, 9078963 + 9078964.

It is an arithmetic number, because the mean of its divisors is an integer number (9078964).

Almost surely, 2^18157927 is an apocalyptic number.

18157927 is a deficient number, since it is larger than the sum of its proper divisors (1).

18157927 is an equidigital number, since it uses as much as digits as its factorization.

18157927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 40.

The square root of 18157927 is about 4261.2119168143. The cubic root of 18157927 is about 262.8383639619.

The spelling of 18157927 in words is "eighteen million, one hundred fifty-seven thousand, nine hundred twenty-seven".