20117832810517 has 64 divisors (see below), whose sum is σ = 22855788426240. Its totient is φ = 17585380454400.

The previous prime is 20117832810469. The next prime is 20117832810521. The reversal of 20117832810517 is 71501823871102.

It is a de Polignac number, because none of the positive numbers 2^k-20117832810517 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 (20117832810577) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3209094459 + ... + 3209100727.

It is an arithmetic number, because the mean of its divisors is an integer number (357121694160).

Almost surely, 2^{20117832810517} is an apocalyptic number.

It is an amenable number.

20117832810517 is a deficient number, since it is larger than the sum of its proper divisors (2737955615723).

20117832810517 is a wasteful number, since it uses less digits than its factorization.

20117832810517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7694.

The product of its (nonzero) digits is 188160, while the sum is 46.

The spelling of 20117832810517 in words is "twenty trillion, one hundred seventeen billion, eight hundred thirty-two million, eight hundred ten thousand, five hundred seventeen".