2003445021 has 8 divisors (see below), whose sum is σ = 2715051424. Its totient is φ = 1313734320.

The previous prime is 2003445001. The next prime is 2003445043. The reversal of 2003445021 is 1205443002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2003445021 - 2²⁷ = 1869227293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003445001) 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 7 ways as a sum of consecutive naturals, for example, 5473711 + ... + 5474076.

It is an arithmetic number, because the mean of its divisors is an integer number (339381428).

Almost surely, 2^2003445021 is an apocalyptic number.

It is an amenable number.

2003445021 is a deficient number, since it is larger than the sum of its proper divisors (711606403).

2003445021 is a wasteful number, since it uses less digits than its factorization.

2003445021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10947851.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2003445021 is about 44759.8594836936. The cubic root of 2003445021 is about 1260.6440440112.

Adding to 2003445021 its reverse (1205443002), we get a palindrome (3208888023).

The spelling of 2003445021 in words is "two billion, three million, four hundred forty-five thousand, twenty-one".