18313081243 has 2 divisors, whose sum is σ = 18313081244. Its totient is φ = 18313081242.

The previous prime is 18313081231. The next prime is 18313081301. The reversal of 18313081243 is 34218031381.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18313081243 is a prime.

It is a super-2 number, since 2×18313081243² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18313081199 and 18313081208.

It is not a weakly prime, because it can be changed into another prime (18313481243) 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, 9156540621 + 9156540622.

It is an arithmetic number, because the mean of its divisors is an integer number (9156540622).

Almost surely, 2^18313081243 is an apocalyptic number.

18313081243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18313081243 is an equidigital number, since it uses as much as digits as its factorization.

18313081243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 18313081243 in words is "eighteen billion, three hundred thirteen million, eighty-one thousand, two hundred forty-three".