18713223 has 6 divisors (see below), whose sum is σ = 27030224. Its totient is φ = 12475476.

The previous prime is 18713183. The next prime is 18713249. The reversal of 18713223 is 32231781.

It is not a de Polignac number, because 18713223 - 2⁶ = 18713159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18711223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1039615 + ... + 1039632.

Almost surely, 2^18713223 is an apocalyptic number.

18713223 is a deficient number, since it is larger than the sum of its proper divisors (8317001).

18713223 is a wasteful number, since it uses less digits than its factorization.

18713223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079253 (or 2079250 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 18713223 is about 4325.8782923240. The cubic root of 18713223 is about 265.4908335223.

The spelling of 18713223 in words is "eighteen million, seven hundred thirteen thousand, two hundred twenty-three".