18744460185889 has 16 divisors (see below), whose sum is σ = 19045215493200. Its totient is φ = 18445860854784.

The previous prime is 18744460185859. The next prime is 18744460185923. The reversal of 18744460185889 is 98858106444781.

It can be written as a sum of positive squares in 8 ways, for example, as 904886075025 + 17839574110864 = 951255^2 + 4223692^2 .

It is a cyclic number.

It is not a de Polignac number, because 18744460185889 - 2⁷ = 18744460185761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18744460185859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21187197 + ... + 22054165.

It is an arithmetic number, because the mean of its divisors is an integer number (1190325968325).

Almost surely, 2^{18744460185889} is an apocalyptic number.

It is an amenable number.

18744460185889 is a deficient number, since it is larger than the sum of its proper divisors (300755307311).

18744460185889 is an equidigital number, since it uses as much as digits as its factorization.

18744460185889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868212.

The product of its (nonzero) digits is 495452160, while the sum is 73.

The spelling of 18744460185889 in words is "eighteen trillion, seven hundred forty-four billion, four hundred sixty million, one hundred eighty-five thousand, eight hundred eighty-nine".