20579123 has 2 divisors, whose sum is σ = 20579124. Its totient is φ = 20579122.

The previous prime is 20579113. The next prime is 20579177. The reversal of 20579123 is 32197502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20579123 - 2⁶ = 20579059 is a prime.

It is not a weakly prime, because it can be changed into another prime (20579113) 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, 10289561 + 10289562.

It is an arithmetic number, because the mean of its divisors is an integer number (10289562).

Almost surely, 2^20579123 is an apocalyptic number.

20579123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20579123 is an equidigital number, since it uses as much as digits as its factorization.

20579123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20579123 is about 4536.4218278286. The cubic root of 20579123 is about 274.0368421520.

It can be divided in two parts, 20579 and 123, that added together give a palindrome (20702).

The spelling of 20579123 in words is "twenty million, five hundred seventy-nine thousand, one hundred twenty-three".