20069529409 has 2 divisors, whose sum is σ = 20069529410. Its totient is φ = 20069529408.

The previous prime is 20069529353. The next prime is 20069529421. The reversal of 20069529409 is 90492596002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17457808384 + 2611721025 = 132128^2 + 51105^2 .

It is a cyclic number.

It is not a de Polignac number, because 20069529409 - 2³¹ = 17922045761 is a prime.

It is not a weakly prime, because it can be changed into another prime (20069529499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10034764704 + 10034764705.

It is an arithmetic number, because the mean of its divisors is an integer number (10034764705).

Almost surely, 2^20069529409 is an apocalyptic number.

It is an amenable number.

20069529409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20069529409 is an equidigital number, since it uses as much as digits as its factorization.

20069529409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 20069529409 in words is "twenty billion, sixty-nine million, five hundred twenty-nine thousand, four hundred nine".