20344800659 has 2 divisors, whose sum is σ = 20344800660. Its totient is φ = 20344800658.

The previous prime is 20344800631. The next prime is 20344800667. The reversal of 20344800659 is 95600844302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20344800659 - 2⁸ = 20344800403 is a prime.

It is not a weakly prime, because it can be changed into another prime (20344800689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172400329 + 10172400330.

It is an arithmetic number, because the mean of its divisors is an integer number (10172400330).

Almost surely, 2^20344800659 is an apocalyptic number.

20344800659 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344800659 is an equidigital number, since it uses as much as digits as its factorization.

20344800659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 20344800659 in words is "twenty billion, three hundred forty-four million, eight hundred thousand, six hundred fifty-nine".