20116579191 has 16 divisors (see below), whose sum is σ = 27104523264. Its totient is φ = 13270138304.

The previous prime is 20116579187. The next prime is 20116579237. The reversal of 20116579191 is 19197561102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20116579191 - 2² = 20116579187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116572191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240715 + ... + 313331.

It is an arithmetic number, because the mean of its divisors is an integer number (1694032704).

Almost surely, 2^20116579191 is an apocalyptic number.

20116579191 is a deficient number, since it is larger than the sum of its proper divisors (6987944073).

20116579191 is a wasteful number, since it uses less digits than its factorization.

20116579191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73590.

The product of its (nonzero) digits is 34020, while the sum is 42.

The spelling of 20116579191 in words is "twenty billion, one hundred sixteen million, five hundred seventy-nine thousand, one hundred ninety-one".