20579057 has 2 divisors, whose sum is σ = 20579058. Its totient is φ = 20579056.

The previous prime is 20579051. The next prime is 20579059. The reversal of 20579057 is 75097502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19749136 + 829921 = 4444^2 + 911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20579057 is a prime.

Together with 20579059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20579051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10289528 + 10289529.

It is an arithmetic number, because the mean of its divisors is an integer number (10289529).

Almost surely, 2^20579057 is an apocalyptic number.

It is an amenable number.

20579057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20579057 is an equidigital number, since it uses as much as digits as its factorization.

20579057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 20579057 is about 4536.4145533670. The cubic root of 20579057 is about 274.0365491941.

The spelling of 20579057 in words is "twenty million, five hundred seventy-nine thousand, fifty-seven".