20123210329 has 2 divisors, whose sum is σ = 20123210330. Its totient is φ = 20123210328.

The previous prime is 20123210323. The next prime is 20123210351. The reversal of 20123210329 is 92301232102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19108915225 + 1014295104 = 138235^2 + 31848^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123210329 - 2⁵ = 20123210297 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123210323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061605164 + 10061605165.

It is an arithmetic number, because the mean of its divisors is an integer number (10061605165).

Almost surely, 2^20123210329 is an apocalyptic number.

It is an amenable number.

20123210329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123210329 is an equidigital number, since it uses as much as digits as its factorization.

20123210329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 20123210329 in words is "twenty billion, one hundred twenty-three million, two hundred ten thousand, three hundred twenty-nine".