20660510017 has 8 divisors (see below), whose sum is σ = 23620899456. Its totient is φ = 17702342592.

The previous prime is 20660509951. The next prime is 20660510041. The reversal of 20660510017 is 71001506602.

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 20660510017 - 2²⁷ = 20526292289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20660510047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535528 + ... + 572809.

It is an arithmetic number, because the mean of its divisors is an integer number (2952612432).

Almost surely, 2^20660510017 is an apocalyptic number.

It is an amenable number.

20660510017 is a deficient number, since it is larger than the sum of its proper divisors (2960389439).

20660510017 is a wasteful number, since it uses less digits than its factorization.

20660510017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111007.

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 20660510017 in words is "twenty billion, six hundred sixty million, five hundred ten thousand, seventeen".