20328859 has 2 divisors, whose sum is σ = 20328860. Its totient is φ = 20328858.

The previous prime is 20328857. The next prime is 20328877. The reversal of 20328859 is 95882302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20328859 - 2¹ = 20328857 is a prime.

Together with 20328857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20328853) 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, 10164429 + 10164430.

It is an arithmetic number, because the mean of its divisors is an integer number (10164430).

Almost surely, 2^20328859 is an apocalyptic number.

20328859 is a deficient number, since it is larger than the sum of its proper divisors (1).

20328859 is an equidigital number, since it uses as much as digits as its factorization.

20328859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 20328859 is about 4508.7535971707. The cubic root of 20328859 is about 272.9214486844.

The spelling of 20328859 in words is "twenty million, three hundred twenty-eight thousand, eight hundred fifty-nine".