21323000331023 has 32 divisors (see below), whose sum is σ = 23804980669440. Its totient is φ = 18980948851200.

The previous prime is 21323000330993. The next prime is 21323000331049. The reversal of 21323000331023 is 32013300032312.

It is a cyclic number.

It is not a de Polignac number, because 21323000331023 - 2¹⁴ = 21323000314639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21323000331023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323000331223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 888187286 + ... + 888211292.

It is an arithmetic number, because the mean of its divisors is an integer number (743905645920).

Almost surely, 2^{21323000331023} is an apocalyptic number.

21323000331023 is a deficient number, since it is larger than the sum of its proper divisors (2481980338417).

21323000331023 is a wasteful number, since it uses less digits than its factorization.

21323000331023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28487.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21323000331023 its reverse (32013300032312), we get a palindrome (53336300363335).

The spelling of 21323000331023 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty-one thousand, twenty-three".