20577159191 has 8 divisors (see below), whose sum is σ = 20613825168. Its totient is φ = 20540520000.

The previous prime is 20577159167. The next prime is 20577159203. The reversal of 20577159191 is 19195177502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20577159191 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 (20577155191) 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 7 ways as a sum of consecutive naturals, for example, 2073341 + ... + 2083241.

It is an arithmetic number, because the mean of its divisors is an integer number (2576728146).

Almost surely, 2^20577159191 is an apocalyptic number.

20577159191 is a deficient number, since it is larger than the sum of its proper divisors (36665977).

20577159191 is an equidigital number, since it uses as much as digits as its factorization.

20577159191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13393.

The product of its (nonzero) digits is 198450, while the sum is 47.

The spelling of 20577159191 in words is "twenty billion, five hundred seventy-seven million, one hundred fifty-nine thousand, one hundred ninety-one".