18366094529 has 4 divisors (see below), whose sum is σ = 18366375876. Its totient is φ = 18365813184.

The previous prime is 18366094499. The next prime is 18366094547. The reversal of 18366094529 is 92549066381.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92549066381 = 277 ⋅334112153.

It can be written as a sum of positive squares in 2 ways, for example, as 11649964225 + 6716130304 = 107935^2 + 81952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18366094529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18366094559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13757 + ... + 192149.

It is an arithmetic number, because the mean of its divisors is an integer number (4591593969).

Almost surely, 2^18366094529 is an apocalyptic number.

It is an amenable number.

18366094529 is a deficient number, since it is larger than the sum of its proper divisors (281347).

18366094529 is a wasteful number, since it uses less digits than its factorization.

18366094529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281346.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 18366094529 in words is "eighteen billion, three hundred sixty-six million, ninety-four thousand, five hundred twenty-nine".