21333203323 has 4 divisors (see below), whose sum is σ = 21335489208. Its totient is φ = 21330917440.

The previous prime is 21333203291. The next prime is 21333203327. The reversal of 21333203323 is 32330233312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21333203323 - 2⁵ = 21333203291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333203327) 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 3 ways as a sum of consecutive naturals, for example, 1128886 + ... + 1147627.

It is an arithmetic number, because the mean of its divisors is an integer number (5333872302).

Almost surely, 2^21333203323 is an apocalyptic number.

21333203323 is a deficient number, since it is larger than the sum of its proper divisors (2285885).

21333203323 is an equidigital number, since it uses as much as digits as its factorization.

21333203323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285884.

The product of its (nonzero) digits is 5832, while the sum is 25.

Adding to 21333203323 its reverse (32330233312), we get a palindrome (53663436635).

The spelling of 21333203323 in words is "twenty-one billion, three hundred thirty-three million, two hundred three thousand, three hundred twenty-three".