18518700335227 has 2 divisors, whose sum is σ = 18518700335228. Its totient is φ = 18518700335226.

The previous prime is 18518700335159. The next prime is 18518700335237. The reversal of 18518700335227 is 72253300781581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18518700335227 - 2¹¹ = 18518700333179 is a prime.

It is not a weakly prime, because it can be changed into another prime (18518700335237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9259350167613 + 9259350167614.

It is an arithmetic number, because the mean of its divisors is an integer number (9259350167614).

Almost surely, 2^{18518700335227} is an apocalyptic number.

18518700335227 is a deficient number, since it is larger than the sum of its proper divisors (1).

18518700335227 is an equidigital number, since it uses as much as digits as its factorization.

18518700335227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The spelling of 18518700335227 in words is "eighteen trillion, five hundred eighteen billion, seven hundred million, three hundred thirty-five thousand, two hundred twenty-seven".