23143218173 has 4 divisors (see below), whose sum is σ = 23149515900. Its totient is φ = 23136920448.

The previous prime is 23143218169. The next prime is 23143218179. The reversal of 23143218173 is 37181234132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6861968569 + 16281249604 = 82837^2 + 127598^2 .

It is a cyclic number.

It is not a de Polignac number, because 23143218173 - 2² = 23143218169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23143218179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3143348 + ... + 3150701.

It is an arithmetic number, because the mean of its divisors is an integer number (5787378975).

Almost surely, 2^23143218173 is an apocalyptic number.

It is an amenable number.

23143218173 is a deficient number, since it is larger than the sum of its proper divisors (6297727).

23143218173 is an equidigital number, since it uses as much as digits as its factorization.

23143218173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6297726.

The product of its digits is 24192, while the sum is 35.

The spelling of 23143218173 in words is "twenty-three billion, one hundred forty-three million, two hundred eighteen thousand, one hundred seventy-three".