18330946689 has 16 divisors (see below), whose sum is σ = 26683720704. Its totient is φ = 11101112400.

The previous prime is 18330946687. The next prime is 18330946693. The reversal of 18330946689 is 98664903381.

It is a happy number.

It is not a de Polignac number, because 18330946689 - 2¹ = 18330946687 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18330946687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170157 + ... + 256154.

It is an arithmetic number, because the mean of its divisors is an integer number (1667732544).

Almost surely, 2^18330946689 is an apocalyptic number.

It is an amenable number.

18330946689 is a deficient number, since it is larger than the sum of its proper divisors (8352774015).

18330946689 is a wasteful number, since it uses less digits than its factorization.

18330946689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427628.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 18330946689 in words is "eighteen billion, three hundred thirty million, nine hundred forty-six thousand, six hundred eighty-nine".