20579101 has 2 divisors, whose sum is σ = 20579102. Its totient is φ = 20579100.

The previous prime is 20579087. The next prime is 20579113. The reversal of 20579101 is 10197502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17935225 + 2643876 = 4235^2 + 1626^2 .

It is a cyclic number.

It is not a de Polignac number, because 20579101 - 2⁹ = 20578589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20579701) 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, 10289550 + 10289551.

It is an arithmetic number, because the mean of its divisors is an integer number (10289551).

Almost surely, 2^20579101 is an apocalyptic number.

It is an amenable number.

20579101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20579101 is an equidigital number, since it uses as much as digits as its factorization.

20579101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 20579101 is about 4536.4194030094. The cubic root of 20579101 is about 274.0367444994.

It can be divided in two parts, 20 and 579101, that added together give a square (579121 = 761²).

The spelling of 20579101 in words is "twenty million, five hundred seventy-nine thousand, one hundred one".