21323302323 has 32 divisors (see below), whose sum is σ = 31006886400. Its totient is φ = 12993125376.

The previous prime is 21323302321. The next prime is 21323302339. The reversal of 21323302323 is 32320332312.

It is not a de Polignac number, because 21323302323 - 2¹ = 21323302321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21323302293 and 21323302302.

It is not an unprimeable number, because it can be changed into a prime (21323302321) 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 31 ways as a sum of consecutive naturals, for example, 139168 + ... + 249026.

It is an arithmetic number, because the mean of its divisors is an integer number (968965200).

Almost surely, 2^21323302323 is an apocalyptic number.

21323302323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21323302323 is a deficient number, since it is larger than the sum of its proper divisors (9683584077).

21323302323 is a wasteful number, since it uses less digits than its factorization.

21323302323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110011.

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21323302323 its reverse (32320332312), we get a palindrome (53643634635).

The spelling of 21323302323 in words is "twenty-one billion, three hundred twenty-three million, three hundred two thousand, three hundred twenty-three".