18352016686687 has 2 divisors, whose sum is σ = 18352016686688. Its totient is φ = 18352016686686.

The previous prime is 18352016686643. The next prime is 18352016686733. The reversal of 18352016686687 is 78668661025381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18352016686687 - 2³⁵ = 18317656948319 is a prime.

It is a super-3 number, since 3×18352016686687³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18352016686607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9176008343343 + 9176008343344.

It is an arithmetic number, because the mean of its divisors is an integer number (9176008343344).

Almost surely, 2^{18352016686687} is an apocalyptic number.

18352016686687 is a deficient number, since it is larger than the sum of its proper divisors (1).

18352016686687 is an equidigital number, since it uses as much as digits as its factorization.

18352016686687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139345920, while the sum is 67.

The spelling of 18352016686687 in words is "eighteen trillion, three hundred fifty-two billion, sixteen million, six hundred eighty-six thousand, six hundred eighty-seven".