20050559999 has 16 divisors (see below), whose sum is σ = 21308268960. Its totient is φ = 18840729600.

The previous prime is 20050559953. The next prime is 20050560007. The reversal of 20050559999 is 99995505002.

It is a Cunningham number, because it is equal to 141600²-1.

It is a cyclic number.

It is not a de Polignac number, because 20050559999 - 2¹⁶ = 20050494463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20050559999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050559929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70799 + ... + 212399.

It is an arithmetic number, because the mean of its divisors is an integer number (1331766810).

Almost surely, 2^20050559999 is an apocalyptic number.

20050559999 is a deficient number, since it is larger than the sum of its proper divisors (1257708961).

20050559999 is a wasteful number, since it uses less digits than its factorization.

20050559999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141770.

The product of its (nonzero) digits is 1640250, while the sum is 53.

The spelling of 20050559999 in words is "twenty billion, fifty million, five hundred fifty-nine thousand, nine hundred ninety-nine".