21013332303 has 8 divisors (see below), whose sum is σ = 28021686400. Its totient is φ = 14006933208.

The previous prime is 21013332257. The next prime is 21013332419. The reversal of 21013332303 is 30323331012.

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

It is not a de Polignac number, because 21013332303 - 2²¹ = 21011235151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21013332303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013332203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463483 + ... + 506796.

It is an arithmetic number, because the mean of its divisors is an integer number (3502710800).

Almost surely, 2^21013332303 is an apocalyptic number.

21013332303 is a deficient number, since it is larger than the sum of its proper divisors (7008354097).

21013332303 is an equidigital number, since it uses as much as digits as its factorization.

21013332303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977501.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21013332303 its reverse (30323331012), we get a palindrome (51336663315).

The spelling of 21013332303 in words is "twenty-one billion, thirteen million, three hundred thirty-two thousand, three hundred three".