21330031323 has 8 divisors (see below), whose sum is σ = 28441417536. Its totient is φ = 14219333000.

The previous prime is 21330031319. The next prime is 21330031343. The reversal of 21330031323 is 32313003312.

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

It is a cyclic number.

It is not a de Polignac number, because 21330031323 - 2² = 21330031319 is a prime.

It is a super-2 number, since 2×21330031323² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21330031323.

It is not an unprimeable number, because it can be changed into a prime (21330031343) 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, 94653 + ... + 227198.

It is an arithmetic number, because the mean of its divisors is an integer number (3555177192).

Almost surely, 2^21330031323 is an apocalyptic number.

21330031323 is a deficient number, since it is larger than the sum of its proper divisors (7111386213).

21330031323 is a wasteful number, since it uses less digits than its factorization.

21330031323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343945.

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

Adding to 21330031323 its reverse (32313003312), we get a palindrome (53643034635).

The spelling of 21330031323 in words is "twenty-one billion, three hundred thirty million, thirty-one thousand, three hundred twenty-three".