18036000009 has 12 divisors (see below), whose sum is σ = 27584470836. Its totient is φ = 11316705792.

The previous prime is 18035999987. The next prime is 18036000019. The reversal of 18036000009 is 90000063081.

It can be written as a sum of positive squares in 2 ways, for example, as 6963068025 + 11072931984 = 83445^2 + 105228^2 .

It is not a de Polignac number, because 18036000009 - 2⁵ = 18035999977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18036000019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58941024 + ... + 58941329.

It is an arithmetic number, because the mean of its divisors is an integer number (2298705903).

Almost surely, 2^18036000009 is an apocalyptic number.

It is an amenable number.

18036000009 is a deficient number, since it is larger than the sum of its proper divisors (9548470827).

18036000009 is a wasteful number, since it uses less digits than its factorization.

18036000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117882376 (or 117882373 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 18036000009 in words is "eighteen billion, thirty-six million, nine", and thus it is an aban number and an uban number.