21323310223 has 8 divisors (see below), whose sum is σ = 21627730080. Its totient is φ = 21019004160.

The previous prime is 21323310193. The next prime is 21323310233. The reversal of 21323310223 is 32201332312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323310223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323310194 and 21323310203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323310233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393223 + ... + 444151.

It is an arithmetic number, because the mean of its divisors is an integer number (2703466260).

Almost surely, 2^21323310223 is an apocalyptic number.

21323310223 is a deficient number, since it is larger than the sum of its proper divisors (304419857).

21323310223 is an equidigital number, since it uses as much as digits as its factorization.

21323310223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56897.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21323310223 its reverse (32201332312), we get a palindrome (53524642535).

The spelling of 21323310223 in words is "twenty-one billion, three hundred twenty-three million, three hundred ten thousand, two hundred twenty-three".