21330322003 has 4 divisors (see below), whose sum is σ = 21341135088. Its totient is φ = 21319508920.

The previous prime is 21330321989. The next prime is 21330322009. The reversal of 21330322003 is 30022303312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21330322003 - 2²¹ = 21328224851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330322009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5403583 + ... + 5407528.

It is an arithmetic number, because the mean of its divisors is an integer number (5335283772).

Almost surely, 2^21330322003 is an apocalyptic number.

21330322003 is a deficient number, since it is larger than the sum of its proper divisors (10813085).

21330322003 is a wasteful number, since it uses less digits than its factorization.

21330322003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10813084.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21330322003 its reverse (30022303312), we get a palindrome (51352625315).

The spelling of 21330322003 in words is "twenty-one billion, three hundred thirty million, three hundred twenty-two thousand, three".