20579693 has 2 divisors, whose sum is σ = 20579694. Its totient is φ = 20579692.

The previous prime is 20579683. The next prime is 20579701. The reversal of 20579693 is 39697502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12411529 + 8168164 = 3523^2 + 2858^2 .

It is a cyclic number.

It is not a de Polignac number, because 20579693 - 2²² = 16385389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20579693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20579623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10289846 + 10289847.

It is an arithmetic number, because the mean of its divisors is an integer number (10289847).

Almost surely, 2^20579693 is an apocalyptic number.

It is an amenable number.

20579693 is a deficient number, since it is larger than the sum of its proper divisors (1).

20579693 is an equidigital number, since it uses as much as digits as its factorization.

20579693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 20579693 is about 4536.4846522390. The cubic root of 20579693 is about 274.0393722170.

The spelling of 20579693 in words is "twenty million, five hundred seventy-nine thousand, six hundred ninety-three".