18669087329 has 4 divisors (see below), whose sum is σ = 18894016176. Its totient is φ = 18444158484.

The previous prime is 18669087289. The next prime is 18669087341. The reversal of 18669087329 is 92378096681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92378096681 = 13 ⋅7106007437.

It is a cyclic number.

It is not a de Polignac number, because 18669087329 - 2¹⁶ = 18669021793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18669087029) 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, 112464299 + ... + 112464464.

It is an arithmetic number, because the mean of its divisors is an integer number (4723504044).

Almost surely, 2^18669087329 is an apocalyptic number.

It is an amenable number.

18669087329 is a deficient number, since it is larger than the sum of its proper divisors (224928847).

18669087329 is an equidigital number, since it uses as much as digits as its factorization.

18669087329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224928846.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 18669087329 in words is "eighteen billion, six hundred sixty-nine million, eighty-seven thousand, three hundred twenty-nine".