21013330203 has 16 divisors (see below), whose sum is σ = 31641204000. Its totient is φ = 13779231840.

The previous prime is 21013330189. The next prime is 21013330213. The reversal of 21013330203 is 30203331012.

It is not a de Polignac number, because 21013330203 - 2⁹ = 21013329691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013330213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6377628 + ... + 6380921.

It is an arithmetic number, because the mean of its divisors is an integer number (1977575250).

Almost surely, 2^21013330203 is an apocalyptic number.

21013330203 is a deficient number, since it is larger than the sum of its proper divisors (10627873797).

21013330203 is a wasteful number, since it uses less digits than its factorization.

21013330203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12758619 (or 12758613 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21013330203 its reverse (30203331012), we get a palindrome (51216661215).

The spelling of 21013330203 in words is "twenty-one billion, thirteen million, three hundred thirty thousand, two hundred three".