18318064871 has 2 divisors, whose sum is σ = 18318064872. Its totient is φ = 18318064870.

The previous prime is 18318064847. The next prime is 18318065009. The reversal of 18318064871 is 17846081381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18318064871 - 2¹⁰ = 18318063847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18318064771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9159032435 + 9159032436.

It is an arithmetic number, because the mean of its divisors is an integer number (9159032436).

Almost surely, 2^18318064871 is an apocalyptic number.

18318064871 is a deficient number, since it is larger than the sum of its proper divisors (1).

18318064871 is an equidigital number, since it uses as much as digits as its factorization.

18318064871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 47.

The spelling of 18318064871 in words is "eighteen billion, three hundred eighteen million, sixty-four thousand, eight hundred seventy-one".