2003443345 has 4 divisors (see below), whose sum is σ = 2404132020. Its totient is φ = 1602754672.

The previous prime is 2003443339. The next prime is 2003443349. The reversal of 2003443345 is 5433443002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 449270416 + 1554172929 = 21196^2 + 39423^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003443345 - 2¹⁷ = 2003312273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2003443349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200344330 + ... + 200344339.

It is an arithmetic number, because the mean of its divisors is an integer number (601033005).

Almost surely, 2^2003443345 is an apocalyptic number.

It is an amenable number.

2003443345 is a deficient number, since it is larger than the sum of its proper divisors (400688675).

2003443345 is an equidigital number, since it uses as much as digits as its factorization.

2003443345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400688674.

The product of its (nonzero) digits is 17280, while the sum is 28.

The square root of 2003443345 is about 44759.8407615577. The cubic root of 2003443345 is about 1260.6436924767.

Adding to 2003443345 its reverse (5433443002), we get a palindrome (7436886347).

The spelling of 2003443345 in words is "two billion, three million, four hundred forty-three thousand, three hundred forty-five".