18468094681 has 4 divisors (see below), whose sum is σ = 18470510500. Its totient is φ = 18465678864.

The previous prime is 18468094669. The next prime is 18468094703. The reversal of 18468094681 is 18649086481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10051867081 + 8416227600 = 100259^2 + 91740^2 .

It is a cyclic number.

It is not a de Polignac number, because 18468094681 - 2¹⁷ = 18467963609 is a prime.

It is a super-2 number, since 2×18468094681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18468094661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196406 + ... + 1211743.

It is an arithmetic number, because the mean of its divisors is an integer number (4617627625).

Almost surely, 2^18468094681 is an apocalyptic number.

It is an amenable number.

18468094681 is a deficient number, since it is larger than the sum of its proper divisors (2415819).

18468094681 is an equidigital number, since it uses as much as digits as its factorization.

18468094681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415818.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 18468094681 in words is "eighteen billion, four hundred sixty-eight million, ninety-four thousand, six hundred eighty-one".