18343416685 has 12 divisors (see below), whose sum is σ = 24195119004. Its totient is φ = 13340666240.

The previous prime is 18343416659. The next prime is 18343416727. The reversal of 18343416685 is 58661434381.

It can be written as a sum of positive squares in 2 ways, for example, as 1898432041 + 16444984644 = 43571^2 + 128238^2 .

It is not a de Polignac number, because 18343416685 - 2⁷ = 18343416557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 15159244 + ... + 15160453.

It is an arithmetic number, because the mean of its divisors is an integer number (2016259917).

Almost surely, 2^18343416685 is an apocalyptic number.

It is an amenable number.

18343416685 is a deficient number, since it is larger than the sum of its proper divisors (5851702319).

18343416685 is a wasteful number, since it uses less digits than its factorization.

18343416685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30319724 (or 30319713 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The spelling of 18343416685 in words is "eighteen billion, three hundred forty-three million, four hundred sixteen thousand, six hundred eighty-five".