21332322329 has 2 divisors, whose sum is σ = 21332322330. Its totient is φ = 21332322328.

The previous prime is 21332322307. The next prime is 21332322331. The reversal of 21332322329 is 92322323312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21042403600 + 289918729 = 145060^2 + 17027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332322329 is a prime.

Together with 21332322331, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21332322295 and 21332322304.

It is not a weakly prime, because it can be changed into another prime (21332322359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666161164 + 10666161165.

It is an arithmetic number, because the mean of its divisors is an integer number (10666161165).

Almost surely, 2^21332322329 is an apocalyptic number.

It is an amenable number.

21332322329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332322329 is an equidigital number, since it uses as much as digits as its factorization.

21332322329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 32.

The spelling of 21332322329 in words is "twenty-one billion, three hundred thirty-two million, three hundred twenty-two thousand, three hundred twenty-nine".