20112775559 has 16 divisors (see below), whose sum is σ = 20768970240. Its totient is φ = 19467829920.

The previous prime is 20112775513. The next prime is 20112775583. The reversal of 20112775559 is 95557721102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112775559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112771559) 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 in 15 ways as a sum of consecutive naturals, for example, 3712937 + ... + 3718349.

It is an arithmetic number, because the mean of its divisors is an integer number (1298060640).

Almost surely, 2^20112775559 is an apocalyptic number.

20112775559 is a deficient number, since it is larger than the sum of its proper divisors (656194681).

20112775559 is an equidigital number, since it uses as much as digits as its factorization.

20112775559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430.

The product of its (nonzero) digits is 220500, while the sum is 44.

The spelling of 20112775559 in words is "twenty billion, one hundred twelve million, seven hundred seventy-five thousand, five hundred fifty-nine".