18450012313 has 2 divisors, whose sum is σ = 18450012314. Its totient is φ = 18450012312.

The previous prime is 18450012283. The next prime is 18450012319. The reversal of 18450012313 is 31321005481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16207326864 + 2242685449 = 127308^2 + 47357^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18450012313 is a prime.

It is not a weakly prime, because it can be changed into another prime (18450012319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9225006156 + 9225006157.

It is an arithmetic number, because the mean of its divisors is an integer number (9225006157).

Almost surely, 2^18450012313 is an apocalyptic number.

It is an amenable number.

18450012313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18450012313 is an equidigital number, since it uses as much as digits as its factorization.

18450012313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 18450012313 its reverse (31321005481), we get a palindrome (49771017794).

The spelling of 18450012313 in words is "eighteen billion, four hundred fifty million, twelve thousand, three hundred thirteen".