18003223 has 16 divisors (see below), whose sum is σ = 21268800. Its totient is φ = 14918400.

The previous prime is 18003217. The next prime is 18003247. The reversal of 18003223 is 32230081.

It is a happy number.

It is not a de Polignac number, because 18003223 - 2⁵ = 18003191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18003223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18003253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42553 + ... + 42973.

It is an arithmetic number, because the mean of its divisors is an integer number (1329300).

Almost surely, 2^18003223 is an apocalyptic number.

18003223 is a deficient number, since it is larger than the sum of its proper divisors (3265577).

18003223 is a wasteful number, since it uses less digits than its factorization.

18003223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 18003223 is about 4243.0205043106. The cubic root of 18003223 is about 262.0897804309.

The spelling of 18003223 in words is "eighteen million, three thousand, two hundred twenty-three".