18108227 has 2 divisors, whose sum is σ = 18108228. Its totient is φ = 18108226.

The previous prime is 18108217. The next prime is 18108229. The reversal of 18108227 is 72280181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18108227 - 2⁶ = 18108163 is a prime.

Together with 18108229, it forms a pair of twin primes.

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 18108227.

It is not a weakly prime, because it can be changed into another prime (18108229) 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, 9054113 + 9054114.

It is an arithmetic number, because the mean of its divisors is an integer number (9054114).

Almost surely, 2^18108227 is an apocalyptic number.

18108227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18108227 is an equidigital number, since it uses as much as digits as its factorization.

18108227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 18108227 is about 4255.3762465850. The cubic root of 18108227 is about 262.5983401762.

The spelling of 18108227 in words is "eighteen million, one hundred eight thousand, two hundred twenty-seven".