2003321403 has 24 divisors (see below), whose sum is σ = 3003040768. Its totient is φ = 1334577384.

The previous prime is 2003321399. The next prime is 2003321443. The reversal of 2003321403 is 3041233002.

2003321403 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2003321403 - 2² = 2003321399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2003321443) 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, 518826 + ... + 522672.

Almost surely, 2^2003321403 is an apocalyptic number.

2003321403 is a deficient number, since it is larger than the sum of its proper divisors (999719365).

2003321403 is an equidigital number, since it uses as much as digits as its factorization.

2003321403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005 (or 5993 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 2003321403 is about 44758.4785599332. The cubic root of 2003321403 is about 1260.6181150906.

Adding to 2003321403 its reverse (3041233002), we get a palindrome (5044554405).

The spelling of 2003321403 in words is "two billion, three million, three hundred twenty-one thousand, four hundred three".