18200223 has 24 divisors (see below), whose sum is σ = 27181440. Its totient is φ = 11728080.

The previous prime is 18200219. The next prime is 18200279. The reversal of 18200223 is 32200281.

It is a happy number.

It is not a de Polignac number, because 18200223 - 2² = 18200219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18200196 and 18200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18200213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50518 + ... + 50876.

It is an arithmetic number, because the mean of its divisors is an integer number (1132560).

Almost surely, 2^18200223 is an apocalyptic number.

18200223 is a deficient number, since it is larger than the sum of its proper divisors (8981217).

18200223 is a wasteful number, since it uses less digits than its factorization.

18200223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 18200223 is about 4266.1719374634. The cubic root of 18200223 is about 263.0422857500.

The spelling of 18200223 in words is "eighteen million, two hundred thousand, two hundred twenty-three".