18307789613 has 2 divisors, whose sum is σ = 18307789614. Its totient is φ = 18307789612.

The previous prime is 18307789571. The next prime is 18307789649. The reversal of 18307789613 is 31698770381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15356909929 + 2950879684 = 123923^2 + 54322^2 .

It is a cyclic number.

It is not a de Polignac number, because 18307789613 - 2¹⁶ = 18307724077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18307788613) 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, 9153894806 + 9153894807.

It is an arithmetic number, because the mean of its divisors is an integer number (9153894807).

Almost surely, 2^18307789613 is an apocalyptic number.

It is an amenable number.

18307789613 is a deficient number, since it is larger than the sum of its proper divisors (1).

18307789613 is an equidigital number, since it uses as much as digits as its factorization.

18307789613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 18307789613 in words is "eighteen billion, three hundred seven million, seven hundred eighty-nine thousand, six hundred thirteen".