18382157 has 2 divisors, whose sum is σ = 18382158. Its totient is φ = 18382156.

The previous prime is 18382141. The next prime is 18382159. The reversal of 18382157 is 75128381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17732521 + 649636 = 4211^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 18382157 - 2⁴ = 18382141 is a prime.

Together with 18382159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18382159) 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 as a sum of consecutive naturals, namely, 9191078 + 9191079.

It is an arithmetic number, because the mean of its divisors is an integer number (9191079).

Almost surely, 2^18382157 is an apocalyptic number.

It is an amenable number.

18382157 is a deficient number, since it is larger than the sum of its proper divisors (1).

18382157 is an equidigital number, since it uses as much as digits as its factorization.

18382157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 18382157 is about 4287.4417780303. The cubic root of 18382157 is about 263.9158602772.

The spelling of 18382157 in words is "eighteen million, three hundred eighty-two thousand, one hundred fifty-seven".