21032321333 has 4 divisors (see below), whose sum is σ = 21377113548. Its totient is φ = 20687529120.

The previous prime is 21032321309. The next prime is 21032321371. The reversal of 21032321333 is 33312323012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2213420209 + 18818901124 = 47047^2 + 137182^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032321333 - 2⁶ = 21032321269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21032321299 and 21032321308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032321383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172396016 + ... + 172396137.

It is an arithmetic number, because the mean of its divisors is an integer number (5344278387).

Almost surely, 2^21032321333 is an apocalyptic number.

It is an amenable number.

21032321333 is a deficient number, since it is larger than the sum of its proper divisors (344792215).

21032321333 is an equidigital number, since it uses as much as digits as its factorization.

21032321333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344792214.

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

Adding to 21032321333 its reverse (33312323012), we get a palindrome (54344644345).

The spelling of 21032321333 in words is "twenty-one billion, thirty-two million, three hundred twenty-one thousand, three hundred thirty-three".