20117563343125 has 10 divisors (see below), whose sum is σ = 25138907154350. Its totient is φ = 16094050674000.

The previous prime is 20117563343123. The next prime is 20117563343167. The reversal of 20117563343125 is 52134336571102.

It can be written as a sum of positive squares in 5 ways, for example, as 14292981727236 + 5824581615889 = 3780606^2 + 2413417^2 .

It is not a de Polignac number, because 20117563343125 - 2¹ = 20117563343123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117563343123) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16094050050 + ... + 16094051299.

It is an arithmetic number, because the mean of its divisors is an integer number (2513890715435).

Almost surely, 2^{20117563343125} is an apocalyptic number.

20117563343125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20117563343125 is a deficient number, since it is larger than the sum of its proper divisors (5021343811225).

20117563343125 is an frugal number, since it uses more digits than its factorization.

20117563343125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32188101369 (or 32188101354 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 20117563343125 in words is "twenty trillion, one hundred seventeen billion, five hundred sixty-three million, three hundred forty-three thousand, one hundred twenty-five".