21013204303 has 32 divisors (see below), whose sum is σ = 26069872640. Its totient is φ = 16591068000.

The previous prime is 21013204241. The next prime is 21013204321. The reversal of 21013204303 is 30340231012.

It is a de Polignac number, because none of the positive numbers 2^k-21013204303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013201303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9333928 + ... + 9336178.

It is an arithmetic number, because the mean of its divisors is an integer number (814683520).

Almost surely, 2^21013204303 is an apocalyptic number.

21013204303 is a deficient number, since it is larger than the sum of its proper divisors (5056668337).

21013204303 is an equidigital number, since it uses as much as digits as its factorization.

21013204303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904 (or 2878 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21013204303 its reverse (30340231012), we get a palindrome (51353435315).

The spelling of 21013204303 in words is "twenty-one billion, thirteen million, two hundred four thousand, three hundred three".