18512223 has 8 divisors (see below), whose sum is σ = 24787200. Its totient is φ = 12289368.

The previous prime is 18512203. The next prime is 18512227. The reversal of 18512223 is 32221581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18512223 - 2¹⁸ = 18250079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18512193 and 18512202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18512227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12193 + ... + 13626.

It is an arithmetic number, because the mean of its divisors is an integer number (3098400).

Almost surely, 2^18512223 is an apocalyptic number.

18512223 is a deficient number, since it is larger than the sum of its proper divisors (6274977).

18512223 is a wasteful number, since it uses less digits than its factorization.

18512223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26061.

The product of its digits is 960, while the sum is 24.

The square root of 18512223 is about 4302.5832937899. The cubic root of 18512223 is about 264.5368580585.

The spelling of 18512223 in words is "eighteen million, five hundred twelve thousand, two hundred twenty-three".