20117700124771 has 16 divisors (see below), whose sum is σ = 20951981568000. Its totient is φ = 19295026853760.

The previous prime is 20117700124763. The next prime is 20117700124793. The reversal of 20117700124771 is 17742100771102.

It is a cyclic number.

It is not a de Polignac number, because 20117700124771 - 2³ = 20117700124763 is a prime.

It is a super-2 number, since 2×20117700124771² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20117700124871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48833376 + ... + 49243618.

It is an arithmetic number, because the mean of its divisors is an integer number (1309498848000).

Almost surely, 2^{20117700124771} is an apocalyptic number.

20117700124771 is a deficient number, since it is larger than the sum of its proper divisors (834281443229).

20117700124771 is a wasteful number, since it uses less digits than its factorization.

20117700124771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424386.

The product of its (nonzero) digits is 38416, while the sum is 40.

Adding to 20117700124771 its reverse (17742100771102), we get a palindrome (37859800895873).

The spelling of 20117700124771 in words is "twenty trillion, one hundred seventeen billion, seven hundred million, one hundred twenty-four thousand, seven hundred seventy-one".