21432304303 has 4 divisors (see below), whose sum is σ = 21432766680. Its totient is φ = 21431841928.

The previous prime is 21432304261. The next prime is 21432304307. The reversal of 21432304303 is 30340323412.

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 21432304303 - 2²⁵ = 21398749871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432304307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152800 + ... + 257317.

It is an arithmetic number, because the mean of its divisors is an integer number (5358191670).

Almost surely, 2^21432304303 is an apocalyptic number.

21432304303 is a deficient number, since it is larger than the sum of its proper divisors (462377).

21432304303 is an equidigital number, since it uses as much as digits as its factorization.

21432304303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462376.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21432304303 its reverse (30340323412), we get a palindrome (51772627715).

The spelling of 21432304303 in words is "twenty-one billion, four hundred thirty-two million, three hundred four thousand, three hundred three".