21300335323 has 4 divisors (see below), whose sum is σ = 21300756928. Its totient is φ = 21299913720.

The previous prime is 21300335311. The next prime is 21300335341. The reversal of 21300335323 is 32353300312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21300335323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300335123) 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, 122763 + ... + 240148.

It is an arithmetic number, because the mean of its divisors is an integer number (5325189232).

Almost surely, 2^21300335323 is an apocalyptic number.

21300335323 is a deficient number, since it is larger than the sum of its proper divisors (421605).

21300335323 is an equidigital number, since it uses as much as digits as its factorization.

21300335323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421604.

The product of its (nonzero) digits is 4860, while the sum is 25.

Adding to 21300335323 its reverse (32353300312), we get a palindrome (53653635635).

The spelling of 21300335323 in words is "twenty-one billion, three hundred million, three hundred thirty-five thousand, three hundred twenty-three".