20117505525501 has 8 divisors (see below), whose sum is σ = 26887358221920. Its totient is φ = 13379661589712.

The previous prime is 20117505525499. The next prime is 20117505525521. The reversal of 20117505525501 is 10552550571102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20117505525501 - 2¹ = 20117505525499 is a prime.

It is a super-2 number, since 2×20117505525501² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20117505525501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117505525521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8002188690 + ... + 8002191203.

It is an arithmetic number, because the mean of its divisors is an integer number (3360919777740).

Almost surely, 2^{20117505525501} is an apocalyptic number.

It is an amenable number.

20117505525501 is a deficient number, since it is larger than the sum of its proper divisors (6769852696419).

20117505525501 is a wasteful number, since it uses less digits than its factorization.

20117505525501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16004380315.

The product of its (nonzero) digits is 87500, while the sum is 39.

The spelling of 20117505525501 in words is "twenty trillion, one hundred seventeen billion, five hundred five million, five hundred twenty-five thousand, five hundred one".