20117030312205 has 96 divisors (see below), whose sum is σ = 36519623712000. Its totient is φ = 10224839116800.

The previous prime is 20117030312153. The next prime is 20117030312207. The reversal of 20117030312205 is 50221303071102.

20117030312205 is a `hidden beast` number, since 2 + 0 + 117 + 0 + 30 + 312 + 205 = 666.

It is not a de Polignac number, because 20117030312205 - 2¹⁹ = 20117029787917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117030312207) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 506081671 + ... + 506121419.

It is an arithmetic number, because the mean of its divisors is an integer number (380412747000).

Almost surely, 2^{20117030312205} is an apocalyptic number.

It is an amenable number.

20117030312205 is a deficient number, since it is larger than the sum of its proper divisors (16402593399795).

20117030312205 is a wasteful number, since it uses less digits than its factorization.

20117030312205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41571 (or 41568 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

Adding to 20117030312205 its reverse (50221303071102), we get a palindrome (70338333383307).

The spelling of 20117030312205 in words is "twenty trillion, one hundred seventeen billion, thirty million, three hundred twelve thousand, two hundred five".