18517685101685 has 16 divisors (see below), whose sum is σ = 27704380828032. Its totient is φ = 11543492011200.

The previous prime is 18517685101681. The next prime is 18517685101693. The reversal of 18517685101685 is 58610158671581.

It is a happy number.

It is not a de Polignac number, because 18517685101685 - 2² = 18517685101681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18517685101681) 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, 24048941306 + ... + 24048942075.

It is an arithmetic number, because the mean of its divisors is an integer number (1731523801752).

Almost surely, 2^{18517685101685} is an apocalyptic number.

It is an amenable number.

18517685101685 is a deficient number, since it is larger than the sum of its proper divisors (9186695726347).

18517685101685 is a wasteful number, since it uses less digits than its factorization.

18517685101685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48097883404.

The product of its (nonzero) digits is 16128000, while the sum is 62.

The spelling of 18517685101685 in words is "eighteen trillion, five hundred seventeen billion, six hundred eighty-five million, one hundred one thousand, six hundred eighty-five".