2003421443 has 4 divisors (see below), whose sum is σ = 2006800488. Its totient is φ = 2000042400.

The previous prime is 2003421437. The next prime is 2003421451. The reversal of 2003421443 is 3441243002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003421443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2003421403) 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, 1688633 + ... + 1689818.

It is an arithmetic number, because the mean of its divisors is an integer number (501700122).

Almost surely, 2^2003421443 is an apocalyptic number.

2003421443 is a deficient number, since it is larger than the sum of its proper divisors (3379045).

2003421443 is an equidigital number, since it uses as much as digits as its factorization.

2003421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379044.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2003421443 is about 44759.5960996075. The cubic root of 2003421443 is about 1260.6390985994.

Adding to 2003421443 its reverse (3441243002), we get a palindrome (5444664445).

The spelling of 2003421443 in words is "two billion, three million, four hundred twenty-one thousand, four hundred forty-three".