20005405560017 has 16 divisors (see below), whose sum is σ = 20569506503040. Its totient is φ = 19449087292800.

The previous prime is 20005405559999. The next prime is 20005405560047. The reversal of 20005405560017 is 71006550450002.

It is a cyclic number.

It is not a de Polignac number, because 20005405560017 - 2²² = 20005401365713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20005405560047) 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 15 ways as a sum of consecutive naturals, for example, 13879292 + ... + 15252722.

It is an arithmetic number, because the mean of its divisors is an integer number (1285594156440).

Almost surely, 2^{20005405560017} is an apocalyptic number.

It is an amenable number.

20005405560017 is a deficient number, since it is larger than the sum of its proper divisors (564100943023).

20005405560017 is a wasteful number, since it uses less digits than its factorization.

20005405560017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376264.

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 20005405560017 in words is "twenty trillion, five billion, four hundred five million, five hundred sixty thousand, seventeen".