20117505222417 has 8 divisors (see below), whose sum is σ = 26823414578400. Its totient is φ = 13411633007360.

The previous prime is 20117505222389. The next prime is 20117505222427. The reversal of 20117505222417 is 71422250571102.

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

It is a cyclic number.

It is not a de Polignac number, because 20117505222417 - 2¹⁴ = 20117505206033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20117505222427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7995792 + ... + 10206257.

It is an arithmetic number, because the mean of its divisors is an integer number (3352926822300).

Almost surely, 2^{20117505222417} is an apocalyptic number.

It is an amenable number.

20117505222417 is a deficient number, since it is larger than the sum of its proper divisors (6705909355983).

20117505222417 is a wasteful number, since it uses less digits than its factorization.

20117505222417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18570463.

The product of its (nonzero) digits is 78400, while the sum is 39.

Adding to 20117505222417 its reverse (71422250571102), we get a palindrome (91539755793519).

The spelling of 20117505222417 in words is "twenty trillion, one hundred seventeen billion, five hundred five million, two hundred twenty-two thousand, four hundred seventeen".