18888666717017 has 8 divisors (see below), whose sum is σ = 18971342517000. Its totient is φ = 18805992591744.

The previous prime is 18888666716947. The next prime is 18888666717103. The reversal of 18888666717017 is 71071766688881.

It can be written as a sum of positive squares in 4 ways, for example, as 1262935430416 + 17625731286601 = 1123804^2 + 4198301^2 .

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 18888666717017 - 2²⁴ = 18888649939801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18888666717917) 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, 25762109 + ... + 26485157.

It is an arithmetic number, because the mean of its divisors is an integer number (2371417814625).

Almost surely, 2^{18888666717017} is an apocalyptic number.

It is an amenable number.

18888666717017 is a deficient number, since it is larger than the sum of its proper divisors (82675799983).

18888666717017 is a wasteful number, since it uses less digits than its factorization.

18888666717017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837355.

The product of its (nonzero) digits is 303464448, while the sum is 74.

The spelling of 18888666717017 in words is "eighteen trillion, eight hundred eighty-eight billion, six hundred sixty-six million, seven hundred seventeen thousand, seventeen".