18266360227 has 2 divisors, whose sum is σ = 18266360228. Its totient is φ = 18266360226.

The previous prime is 18266360191. The next prime is 18266360257. The reversal of 18266360227 is 72206366281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18266360227 is a prime.

It is not a weakly prime, because it can be changed into another prime (18266360257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9133180113 + 9133180114.

It is an arithmetic number, because the mean of its divisors is an integer number (9133180114).

Almost surely, 2^18266360227 is an apocalyptic number.

18266360227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18266360227 is an equidigital number, since it uses as much as digits as its factorization.

18266360227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 18266360227 in words is "eighteen billion, two hundred sixty-six million, three hundred sixty thousand, two hundred twenty-seven".