20117520662217 has 16 divisors (see below), whose sum is σ = 29261995241472. Its totient is φ = 12192375512720.

The previous prime is 20117520662209. The next prime is 20117520662251. The reversal of 20117520662217 is 71226602571102.

It is a cyclic number.

It is not a de Polignac number, because 20117520662217 - 2³ = 20117520662209 is a prime.

It is a super-2 number, since 2×20117520662217² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20117520662287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5637928 + ... + 8486534.

It is an arithmetic number, because the mean of its divisors is an integer number (1828874702592).

Almost surely, 2^{20117520662217} is an apocalyptic number.

It is an amenable number.

20117520662217 is a deficient number, since it is larger than the sum of its proper divisors (9144474579255).

20117520662217 is a wasteful number, since it uses less digits than its factorization.

20117520662217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062628.

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 20117520662217 in words is "twenty trillion, one hundred seventeen billion, five hundred twenty million, six hundred sixty-two thousand, two hundred seventeen".