2003420321 has 6 divisors (see below), whose sum is σ = 2330509410. Its totient is φ = 1717217376.

The previous prime is 2003420303. The next prime is 2003420333. The reversal of 2003420321 is 1230243002.

It can be written as a sum of positive squares in only one way, i.e., 1401454096 + 601966225 = 37436^2 + 24535^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2003420321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2003420321.

It is not an unprimeable number, because it can be changed into a prime (2003420371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20443016 + ... + 20443113.

It is an arithmetic number, because the mean of its divisors is an integer number (388418235).

Almost surely, 2^2003420321 is an apocalyptic number.

It is an amenable number.

2003420321 is a deficient number, since it is larger than the sum of its proper divisors (327089089).

2003420321 is an equidigital number, since it uses as much as digits as its factorization.

2003420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40886143 (or 40886136 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 2003420321 is about 44759.5835659806. The cubic root of 2003420321 is about 1260.6388632624.

Adding to 2003420321 its reverse (1230243002), we get a palindrome (3233663323).

The spelling of 2003420321 in words is "two billion, three million, four hundred twenty thousand, three hundred twenty-one".