18341406689 has 2 divisors, whose sum is σ = 18341406690. Its totient is φ = 18341406688.

The previous prime is 18341406683. The next prime is 18341406737. The reversal of 18341406689 is 98660414381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17584881664 + 756525025 = 132608^2 + 27505^2 .

It is a cyclic number.

It is not a de Polignac number, because 18341406689 - 2²⁸ = 18072971233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18341406683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9170703344 + 9170703345.

It is an arithmetic number, because the mean of its divisors is an integer number (9170703345).

Almost surely, 2^18341406689 is an apocalyptic number.

It is an amenable number.

18341406689 is a deficient number, since it is larger than the sum of its proper divisors (1).

18341406689 is an equidigital number, since it uses as much as digits as its factorization.

18341406689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 18341406689 in words is "eighteen billion, three hundred forty-one million, four hundred six thousand, six hundred eighty-nine".