18222003 has 20 divisors (see below), whose sum is σ = 28406928. Its totient is φ = 11618640.

The previous prime is 18221989. The next prime is 18222013. The reversal of 18222003 is 30022281.

It is a happy number.

It is not a de Polignac number, because 18222003 - 2¹² = 18217907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18222013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3028 + ... + 6753.

Almost surely, 2^18222003 is an apocalyptic number.

18222003 is a deficient number, since it is larger than the sum of its proper divisors (10184925).

18222003 is an equidigital number, since it uses as much as digits as its factorization.

18222003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816 (or 9807 counting only the distinct ones).

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

The square root of 18222003 is about 4268.7238139753. The cubic root of 18222003 is about 263.1471704942.

Adding to 18222003 its reverse (30022281), we get a palindrome (48244284).

The spelling of 18222003 in words is "eighteen million, two hundred twenty-two thousand, three".