20321232329 has 2 divisors, whose sum is σ = 20321232330. Its totient is φ = 20321232328.

The previous prime is 20321232311. The next prime is 20321232367. The reversal of 20321232329 is 92323212302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18686890000 + 1634342329 = 136700^2 + 40427^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321232329 - 2⁸ = 20321232073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20321232229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160616164 + 10160616165.

It is an arithmetic number, because the mean of its divisors is an integer number (10160616165).

Almost surely, 2^20321232329 is an apocalyptic number.

It is an amenable number.

20321232329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321232329 is an equidigital number, since it uses as much as digits as its factorization.

20321232329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 20321232329 in words is "twenty billion, three hundred twenty-one million, two hundred thirty-two thousand, three hundred twenty-nine".