18534559474017 has 12 divisors (see below), whose sum is σ = 26804435974420. Its totient is φ = 12341467823328.

The previous prime is 18534559473979. The next prime is 18534559474031. The reversal of 18534559474017 is 71047495543581.

18534559474017 is a `hidden beast` number, since 1 + 8 + 5 + 3 + 4 + 559 + 4 + 74 + 0 + 1 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4417714570896 + 14116844903121 = 2101836^2 + 3757239^2 .

It is not a de Polignac number, because 18534559474017 - 2¹⁸ = 18534559211873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18534559474087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1242088738 + ... + 1242103659.

Almost surely, 2^{18534559474017} is an apocalyptic number.

It is an amenable number.

18534559474017 is a deficient number, since it is larger than the sum of its proper divisors (8269876500403).

18534559474017 is a wasteful number, since it uses less digits than its factorization.

18534559474017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484193232 (or 2484193229 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 63.

The spelling of 18534559474017 in words is "eighteen trillion, five hundred thirty-four billion, five hundred fifty-nine million, four hundred seventy-four thousand, seventeen".