18845168323 has 4 divisors (see below), whose sum is σ = 19126439560. Its totient is φ = 18563897088.

The previous prime is 18845168317. The next prime is 18845168369. The reversal of 18845168323 is 32386154881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32386154881 = 34949 ⋅926669.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18845168323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18845168623) 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, 140635518 + ... + 140635651.

It is an arithmetic number, because the mean of its divisors is an integer number (4781609890).

Almost surely, 2^18845168323 is an apocalyptic number.

18845168323 is a deficient number, since it is larger than the sum of its proper divisors (281271237).

18845168323 is an equidigital number, since it uses as much as digits as its factorization.

18845168323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281271236.

The product of its digits is 1105920, while the sum is 49.

The spelling of 18845168323 in words is "eighteen billion, eight hundred forty-five million, one hundred sixty-eight thousand, three hundred twenty-three".