18044203 has 2 divisors, whose sum is σ = 18044204. Its totient is φ = 18044202.

The previous prime is 18044189. The next prime is 18044209. The reversal of 18044203 is 30244081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18044203 is a prime.

It is not a weakly prime, because it can be changed into another prime (18044209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022101 + 9022102.

It is an arithmetic number, because the mean of its divisors is an integer number (9022102).

Almost surely, 2^18044203 is an apocalyptic number.

18044203 is a deficient number, since it is larger than the sum of its proper divisors (1).

18044203 is an equidigital number, since it uses as much as digits as its factorization.

18044203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 18044203 is about 4247.8468663548. The cubic root of 18044203 is about 262.2884911498.

Adding to 18044203 its reverse (30244081), we get a palindrome (48288284).

The spelling of 18044203 in words is "eighteen million, forty-four thousand, two hundred three".