18243203 has 8 divisors (see below), whose sum is σ = 19960320. Its totient is φ = 16535880.

The previous prime is 18243161. The next prime is 18243241. The reversal of 18243203 is 30234281.

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

It is a cyclic number.

It is not a de Polignac number, because 18243203 - 2⁶ = 18243139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18243293) 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, 1778 + ... + 6296.

It is an arithmetic number, because the mean of its divisors is an integer number (2495040).

Almost surely, 2^18243203 is an apocalyptic number.

18243203 is a deficient number, since it is larger than the sum of its proper divisors (1717117).

18243203 is a wasteful number, since it uses less digits than its factorization.

18243203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4897.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 18243203 is about 4271.2062698961. The cubic root of 18243203 is about 263.2491819275.

Adding to 18243203 its reverse (30234281), we get a palindrome (48477484).

The spelling of 18243203 in words is "eighteen million, two hundred forty-three thousand, two hundred three".