20117563345215 has 48 divisors (see below), whose sum is σ = 39852262632000. Its totient is φ = 9196524781056.

The previous prime is 20117563345169. The next prime is 20117563345247. The reversal of 20117563345215 is 51254336571102.

20117563345215 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 7 + 5 + 633 + 4 + 5 + 2 + 1 + 5 = 666.

It is not a de Polignac number, because 20117563345215 - 2¹⁰ = 20117563344191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60139641 + ... + 60473229.

It is an arithmetic number, because the mean of its divisors is an integer number (830255471500).

Almost surely, 2^{20117563345215} is an apocalyptic number.

20117563345215 is a deficient number, since it is larger than the sum of its proper divisors (19734699286785).

20117563345215 is a wasteful number, since it uses less digits than its factorization.

20117563345215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525056 (or 525053 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 20117563345215 in words is "twenty trillion, one hundred seventeen billion, five hundred sixty-three million, three hundred forty-five thousand, two hundred fifteen".