21002332003 has 8 divisors (see below), whose sum is σ = 21393662976. Its totient is φ = 20613654600.

The previous prime is 21002331983. The next prime is 21002332031. The reversal of 21002332003 is 30023320012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002332003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002330003) 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 7 ways as a sum of consecutive naturals, for example, 647413 + ... + 679078.

It is an arithmetic number, because the mean of its divisors is an integer number (2674207872).

Almost surely, 2^21002332003 is an apocalyptic number.

21002332003 is a deficient number, since it is larger than the sum of its proper divisors (391330973).

21002332003 is a wasteful number, since it uses less digits than its factorization.

21002332003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326785.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21002332003 its reverse (30023320012), we get a palindrome (51025652015).

The spelling of 21002332003 in words is "twenty-one billion, two million, three hundred thirty-two thousand, three".