20117700124605 has 80 divisors (see below), whose sum is σ = 36403401729024. Its totient is φ = 10628135452800.

The previous prime is 20117700124589. The next prime is 20117700124663. The reversal of 20117700124605 is 50642100771102.

20117700124605 is a `hidden beast` number, since 2 + 0 + 117 + 70 + 0 + 12 + 460 + 5 = 666.

It is not a de Polignac number, because 20117700124605 - 2⁴ = 20117700124589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20117700124605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 696075655 + ... + 696104555.

Almost surely, 2^{20117700124605} is an apocalyptic number.

It is an amenable number.

20117700124605 is a deficient number, since it is larger than the sum of its proper divisors (16285701604419).

20117700124605 is a wasteful number, since it uses less digits than its factorization.

20117700124605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45088 (or 45079 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

Adding to 20117700124605 its reverse (50642100771102), we get a palindrome (70759800895707).

The spelling of 20117700124605 in words is "twenty trillion, one hundred seventeen billion, seven hundred million, one hundred twenty-four thousand, six hundred five".