21323210323 has 8 divisors (see below), whose sum is σ = 22378925088. Its totient is φ = 20278213824.

The previous prime is 21323210317. The next prime is 21323210387. The reversal of 21323210323 is 32301232312.

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-21323210323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323210294 and 21323210303.

It is not an unprimeable number, because it can be changed into a prime (21323210303) 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, 2675490 + ... + 2683447.

It is an arithmetic number, because the mean of its divisors is an integer number (2797365636).

Almost surely, 2^21323210323 is an apocalyptic number.

21323210323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21323210323 is a deficient number, since it is larger than the sum of its proper divisors (1055714765).

21323210323 is a wasteful number, since it uses less digits than its factorization.

21323210323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359133.

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

Adding to 21323210323 its reverse (32301232312), we get a palindrome (53624442635).

The spelling of 21323210323 in words is "twenty-one billion, three hundred twenty-three million, two hundred ten thousand, three hundred twenty-three".