20336609 has 2 divisors, whose sum is σ = 20336610. Its totient is φ = 20336608.

The previous prime is 20336599. The next prime is 20336611. The reversal of 20336609 is 90663302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12271009 + 8065600 = 3503^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 20336609 - 2⁸ = 20336353 is a prime.

It is a Sophie Germain prime.

Together with 20336611, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20336639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10168304 + 10168305.

It is an arithmetic number, because the mean of its divisors is an integer number (10168305).

Almost surely, 2^20336609 is an apocalyptic number.

It is an amenable number.

20336609 is a deficient number, since it is larger than the sum of its proper divisors (1).

20336609 is an equidigital number, since it uses as much as digits as its factorization.

20336609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 20336609 is about 4509.6129545672. The cubic root of 20336609 is about 272.9561263562.

The spelling of 20336609 in words is "twenty million, three hundred thirty-six thousand, six hundred nine".