18363518273 has 2 divisors, whose sum is σ = 18363518274. Its totient is φ = 18363518272.

The previous prime is 18363518233. The next prime is 18363518279. The reversal of 18363518273 is 37281536381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18363502144 + 16129 = 135512^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 18363518273 - 2²⁴ = 18346741057 is a prime.

It is not a weakly prime, because it can be changed into another prime (18363518279) 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, 9181759136 + 9181759137.

It is an arithmetic number, because the mean of its divisors is an integer number (9181759137).

Almost surely, 2^18363518273 is an apocalyptic number.

It is an amenable number.

18363518273 is a deficient number, since it is larger than the sum of its proper divisors (1).

18363518273 is an equidigital number, since it uses as much as digits as its factorization.

18363518273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The spelling of 18363518273 in words is "eighteen billion, three hundred sixty-three million, five hundred eighteen thousand, two hundred seventy-three".