20117510607747 has 8 divisors (see below), whose sum is σ = 30655254259456. Its totient is φ = 11495720347272.

The previous prime is 20117510607739. The next prime is 20117510607767. The reversal of 20117510607747 is 74770601571102.

It is a happy number.

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

It is not a de Polignac number, because 20117510607747 - 2³ = 20117510607739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20117510607696 and 20117510607705.

It is not an unprimeable number, because it can be changed into a prime (20117510607767) 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, 478988347783 + ... + 478988347824.

It is an arithmetic number, because the mean of its divisors is an integer number (3831906782432).

Almost surely, 2^{20117510607747} is an apocalyptic number.

20117510607747 is a deficient number, since it is larger than the sum of its proper divisors (10537743651709).

20117510607747 is an equidigital number, since it uses as much as digits as its factorization.

20117510607747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957976695617.

The product of its (nonzero) digits is 576240, while the sum is 48.

The spelling of 20117510607747 in words is "twenty trillion, one hundred seventeen billion, five hundred ten million, six hundred seven thousand, seven hundred forty-seven".