20008279 has 2 divisors, whose sum is σ = 20008280. Its totient is φ = 20008278.

The previous prime is 20008271. The next prime is 20008291. The reversal of 20008279 is 97280002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20008279 - 2³ = 20008271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20008271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004139 + 10004140.

It is an arithmetic number, because the mean of its divisors is an integer number (10004140).

Almost surely, 2^20008279 is an apocalyptic number.

20008279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20008279 is an equidigital number, since it uses as much as digits as its factorization.

20008279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 20008279 is about 4473.0614795686. The cubic root of 20008279 is about 271.4792109317.

The spelling of 20008279 in words is "twenty million, eight thousand, two hundred seventy-nine".