18618227 has 2 divisors, whose sum is σ = 18618228. Its totient is φ = 18618226.

The previous prime is 18618221. The next prime is 18618253. The reversal of 18618227 is 72281681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18618227 - 2²⁴ = 1841011 is a prime.

It is not a weakly prime, because it can be changed into another prime (18618221) 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, 9309113 + 9309114.

It is an arithmetic number, because the mean of its divisors is an integer number (9309114).

Almost surely, 2^18618227 is an apocalyptic number.

18618227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18618227 is an equidigital number, since it uses as much as digits as its factorization.

18618227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 35.

The square root of 18618227 is about 4314.8843553449. The cubic root of 18618227 is about 265.0408243739.

The spelling of 18618227 in words is "eighteen million, six hundred eighteen thousand, two hundred twenty-seven".