18318064847 has 2 divisors, whose sum is σ = 18318064848. Its totient is φ = 18318064846.

The previous prime is 18318064819. The next prime is 18318064871. The reversal of 18318064847 is 74846081381.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18318064847 - 2¹⁰ = 18318063823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18318064795 and 18318064804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18318063847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159032423 + 9159032424.

It is an arithmetic number, because the mean of its divisors is an integer number (9159032424).

Almost surely, 2^18318064847 is an apocalyptic number.

18318064847 is a deficient number, since it is larger than the sum of its proper divisors (1).

18318064847 is an equidigital number, since it uses as much as digits as its factorization.

18318064847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The spelling of 18318064847 in words is "eighteen billion, three hundred eighteen million, sixty-four thousand, eight hundred forty-seven".