20117504772271 has 4 divisors (see below), whose sum is σ = 21300887405952. Its totient is φ = 18934122138592.

The previous prime is 20117504772251. The next prime is 20117504772283. The reversal of 20117504772271 is 17227740571102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20117504772271 - 2⁹ = 20117504771759 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 (20117504772251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591691316815 + ... + 591691316848.

It is an arithmetic number, because the mean of its divisors is an integer number (5325221851488).

Almost surely, 2^{20117504772271} is an apocalyptic number.

20117504772271 is a deficient number, since it is larger than the sum of its proper divisors (1183382633681).

20117504772271 is a wasteful number, since it uses less digits than its factorization.

20117504772271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183382633680.

The product of its (nonzero) digits is 384160, while the sum is 46.

The spelling of 20117504772271 in words is "twenty trillion, one hundred seventeen billion, five hundred four million, seven hundred seventy-two thousand, two hundred seventy-one".