18610944185 has 4 divisors (see below), whose sum is σ = 22333133028. Its totient is φ = 14888755344.

The previous prime is 18610944161. The next prime is 18610944199. The reversal of 18610944185 is 58144901681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58144901681 = 859 ⋅67689059.

It can be written as a sum of positive squares in 2 ways, for example, as 3932167849 + 14678776336 = 62707^2 + 121156^2 .

It is a cyclic number.

It is not a de Polignac number, because 18610944185 - 2²² = 18606749881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861094414 + ... + 1861094423.

It is an arithmetic number, because the mean of its divisors is an integer number (5583283257).

Almost surely, 2^18610944185 is an apocalyptic number.

It is an amenable number.

18610944185 is a deficient number, since it is larger than the sum of its proper divisors (3722188843).

18610944185 is an equidigital number, since it uses as much as digits as its factorization.

18610944185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722188842.

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 18610944185 in words is "eighteen billion, six hundred ten million, nine hundred forty-four thousand, one hundred eighty-five".