18316806671 has 2 divisors, whose sum is σ = 18316806672. Its totient is φ = 18316806670.

The previous prime is 18316806653. The next prime is 18316806733. The reversal of 18316806671 is 17660861381.

It is a weak prime.

It is an emirp because it is prime and its reverse (17660861381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18316806671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18316806071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9158403335 + 9158403336.

It is an arithmetic number, because the mean of its divisors is an integer number (9158403336).

Almost surely, 2^18316806671 is an apocalyptic number.

18316806671 is a deficient number, since it is larger than the sum of its proper divisors (1).

18316806671 is an equidigital number, since it uses as much as digits as its factorization.

18316806671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 18316806671 in words is "eighteen billion, three hundred sixteen million, eight hundred six thousand, six hundred seventy-one".