20334013409 has 2 divisors, whose sum is σ = 20334013410. Its totient is φ = 20334013408.

The previous prime is 20334013393. The next prime is 20334013421. The reversal of 20334013409 is 90431043302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14644630225 + 5689383184 = 121015^2 + 75428^2 .

It is a cyclic number.

It is not a de Polignac number, because 20334013409 - 2⁴ = 20334013393 is a prime.

It is not a weakly prime, because it can be changed into another prime (20334013459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167006704 + 10167006705.

It is an arithmetic number, because the mean of its divisors is an integer number (10167006705).

Almost surely, 2^20334013409 is an apocalyptic number.

It is an amenable number.

20334013409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20334013409 is an equidigital number, since it uses as much as digits as its factorization.

20334013409 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 20334013409 in words is "twenty billion, three hundred thirty-four million, thirteen thousand, four hundred nine".