18221103003 has 4 divisors (see below), whose sum is σ = 24294804008. Its totient is φ = 12147402000.

The previous prime is 18221102993. The next prime is 18221103007. The reversal of 18221103003 is 30030112281.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18221103003 - 2¹⁰ = 18221101979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18221103007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3036850498 + ... + 3036850503.

It is an arithmetic number, because the mean of its divisors is an integer number (6073701002).

Almost surely, 2^18221103003 is an apocalyptic number.

18221103003 is a deficient number, since it is larger than the sum of its proper divisors (6073701005).

18221103003 is an equidigital number, since it uses as much as digits as its factorization.

18221103003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073701004.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 18221103003 its reverse (30030112281), we get a palindrome (48251215284).

The spelling of 18221103003 in words is "eighteen billion, two hundred twenty-one million, one hundred three thousand, three".