21320213323 has 8 divisors (see below), whose sum is σ = 21962238480. Its totient is φ = 20683998720.

The previous prime is 21320213311. The next prime is 21320213333. The reversal of 21320213323 is 32331202312.

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-21320213323 is a prime.

It is a super-2 number, since 2×21320213323² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21320213294 and 21320213303.

It is not an unprimeable number, because it can be changed into a prime (21320213333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1445190 + ... + 1459867.

It is an arithmetic number, because the mean of its divisors is an integer number (2745279810).

Almost surely, 2^21320213323 is an apocalyptic number.

21320213323 is a deficient number, since it is larger than the sum of its proper divisors (642025157).

21320213323 is a wasteful number, since it uses less digits than its factorization.

21320213323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905277.

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

Adding to 21320213323 its reverse (32331202312), we get a palindrome (53651415635).

The spelling of 21320213323 in words is "twenty-one billion, three hundred twenty million, two hundred thirteen thousand, three hundred twenty-three".