18636335227 has 2 divisors, whose sum is σ = 18636335228. Its totient is φ = 18636335226.

The previous prime is 18636335209. The next prime is 18636335233. The reversal of 18636335227 is 72253363681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18636335227 - 2¹⁵ = 18636302459 is a prime.

It is a super-2 number, since 2×18636335227² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18636335297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9318167613 + 9318167614.

It is an arithmetic number, because the mean of its divisors is an integer number (9318167614).

Almost surely, 2^18636335227 is an apocalyptic number.

18636335227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18636335227 is an equidigital number, since it uses as much as digits as its factorization.

18636335227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 46.

The spelling of 18636335227 in words is "eighteen billion, six hundred thirty-six million, three hundred thirty-five thousand, two hundred twenty-seven".