20132129309 has 2 divisors, whose sum is σ = 20132129310. Its totient is φ = 20132129308.

The previous prime is 20132129299. The next prime is 20132129359. The reversal of 20132129309 is 90392123102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19576207225 + 555922084 = 139915^2 + 23578^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132129309 - 2²⁴ = 20115352093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20132129359) 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 as a sum of consecutive naturals, namely, 10066064654 + 10066064655.

It is an arithmetic number, because the mean of its divisors is an integer number (10066064655).

Almost surely, 2^20132129309 is an apocalyptic number.

It is an amenable number.

20132129309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20132129309 is an equidigital number, since it uses as much as digits as its factorization.

20132129309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The spelling of 20132129309 in words is "twenty billion, one hundred thirty-two million, one hundred twenty-nine thousand, three hundred nine".