18363837313 has 2 divisors, whose sum is σ = 18363837314. Its totient is φ = 18363837312.

The previous prime is 18363837287. The next prime is 18363837329. The reversal of 18363837313 is 31373836381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11416281409 + 6947555904 = 106847^2 + 83352^2 .

It is a cyclic number.

It is not a de Polignac number, because 18363837313 - 2²⁵ = 18330282881 is a prime.

It is not a weakly prime, because it can be changed into another prime (18363837343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9181918656 + 9181918657.

It is an arithmetic number, because the mean of its divisors is an integer number (9181918657).

Almost surely, 2^18363837313 is an apocalyptic number.

It is an amenable number.

18363837313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18363837313 is an equidigital number, since it uses as much as digits as its factorization.

18363837313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The spelling of 18363837313 in words is "eighteen billion, three hundred sixty-three million, eight hundred thirty-seven thousand, three hundred thirteen".