20117504744724 has 96 divisors (see below), whose sum is σ = 50761059108480. Its totient is φ = 6179466682368.

The previous prime is 20117504744723. The next prime is 20117504744741. The reversal of 20117504744724 is 42744740571102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117504744723) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 29978692 + ... + 30642404.

It is an arithmetic number, because the mean of its divisors is an integer number (528761032380).

Almost surely, 2^{20117504744724} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20117504744724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25380529554240).

20117504744724 is an abundant number, since it is smaller than the sum of its proper divisors (30643554363756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20117504744724 is a wasteful number, since it uses less digits than its factorization.

20117504744724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667369 (or 667367 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 48.

The spelling of 20117504744724 in words is "twenty trillion, one hundred seventeen billion, five hundred four million, seven hundred forty-four thousand, seven hundred twenty-four".