18116227 has 2 divisors, whose sum is σ = 18116228. Its totient is φ = 18116226.

The previous prime is 18116209. The next prime is 18116239. The reversal of 18116227 is 72261181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18116227 - 2⁷ = 18116099 is a prime.

It is equal to p_1158247 and since 18116227 and 1158247 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 18116195 and 18116204.

It is not a weakly prime, because it can be changed into another prime (18116257) 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, 9058113 + 9058114.

It is an arithmetic number, because the mean of its divisors is an integer number (9058114).

Almost surely, 2^18116227 is an apocalyptic number.

18116227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116227 is an equidigital number, since it uses as much as digits as its factorization.

18116227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 18116227 is about 4256.3161301764. The cubic root of 18116227 is about 262.6370054273.

The spelling of 18116227 in words is "eighteen million, one hundred sixteen thousand, two hundred twenty-seven".