20008251859 has 2 divisors, whose sum is σ = 20008251860. Its totient is φ = 20008251858.

The previous prime is 20008251841. The next prime is 20008251899. The reversal of 20008251859 is 95815280002.

It is an a-pointer prime, because the next prime (20008251899) can be obtained adding 20008251859 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20008251859 is a prime.

It is not a weakly prime, because it can be changed into another prime (20008251899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004125929 + 10004125930.

It is an arithmetic number, because the mean of its divisors is an integer number (10004125930).

Almost surely, 2^20008251859 is an apocalyptic number.

20008251859 is a deficient number, since it is larger than the sum of its proper divisors (1).

20008251859 is an equidigital number, since it uses as much as digits as its factorization.

20008251859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 20008251859 in words is "twenty billion, eight million, two hundred fifty-one thousand, eight hundred fifty-nine".