18985323283 has 4 divisors (see below), whose sum is σ = 19057511088. Its totient is φ = 18913135480.

The previous prime is 18985323239. The next prime is 18985323311. The reversal of 18985323283 is 38232358981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38232358981 = 17 ⋅2248962293.

It is a cyclic number.

It is not a de Polignac number, because 18985323283 - 2⁹ = 18985322771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18985323283.

It is not an unprimeable number, because it can be changed into a prime (18985323683) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 36093508 + ... + 36094033.

It is an arithmetic number, because the mean of its divisors is an integer number (4764377772).

Almost surely, 2^18985323283 is an apocalyptic number.

18985323283 is a deficient number, since it is larger than the sum of its proper divisors (72187805).

18985323283 is an equidigital number, since it uses as much as digits as its factorization.

18985323283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72187804.

The product of its digits is 2488320, while the sum is 52.

The spelling of 18985323283 in words is "eighteen billion, nine hundred eighty-five million, three hundred twenty-three thousand, two hundred eighty-three".