20579369 has 2 divisors, whose sum is σ = 20579370. Its totient is φ = 20579368.

The previous prime is 20579353. The next prime is 20579399. The reversal of 20579369 is 96397502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 2601769 = 4240^2 + 1613^2 .

It is a cyclic number.

It is not a de Polignac number, because 20579369 - 2⁴ = 20579353 is a prime.

It is a super-2 number, since 2×20579369² = 847020856876322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20579329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10289684 + 10289685.

It is an arithmetic number, because the mean of its divisors is an integer number (10289685).

Almost surely, 2^20579369 is an apocalyptic number.

It is an amenable number.

20579369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20579369 is an equidigital number, since it uses as much as digits as its factorization.

20579369 is an odious number, because the sum of its binary digits is odd.

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

The square root of 20579369 is about 4536.4489416282. The cubic root of 20579369 is about 274.0379340805.

The spelling of 20579369 in words is "twenty million, five hundred seventy-nine thousand, three hundred sixty-nine".