18684048681 has 16 divisors (see below), whose sum is σ = 27954136320. Its totient is φ = 12332703600.

The previous prime is 18684048569. The next prime is 18684048683.

It is a happy number.

18684048681 is a `hidden beast` number, since 1 + 8 + 6 + 84 + 0 + 486 + 81 = 666.

18684048681 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18684048681 - 2⁷ = 18684048553 is a prime.

It is a super-2 number, since 2×18684048681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18684048683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3423025 + ... + 3428478.

It is an arithmetic number, because the mean of its divisors is an integer number (1747133520).

Almost surely, 2^18684048681 is an apocalyptic number.

It is an amenable number.

18684048681 is a deficient number, since it is larger than the sum of its proper divisors (9270087639).

18684048681 is a wasteful number, since it uses less digits than its factorization.

18684048681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851613 (or 6851607 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 54.

The spelling of 18684048681 in words is "eighteen billion, six hundred eighty-four million, forty-eight thousand, six hundred eighty-one".