18064109 has 4 divisors (see below), whose sum is σ = 20644704. Its totient is φ = 15483516.

The previous prime is 18064093. The next prime is 18064147. The reversal of 18064109 is 90146081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90146081 = 593 ⋅152017.

It is a cyclic number.

It is not a de Polignac number, because 18064109 - 2⁴ = 18064093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18064159) 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 3 ways as a sum of consecutive naturals, for example, 1290287 + ... + 1290300.

It is an arithmetic number, because the mean of its divisors is an integer number (5161176).

Almost surely, 2^18064109 is an apocalyptic number.

It is an amenable number.

18064109 is a deficient number, since it is larger than the sum of its proper divisors (2580595).

18064109 is an equidigital number, since it uses as much as digits as its factorization.

18064109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580594.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18064109 is about 4250.1892899023. The cubic root of 18064109 is about 262.3849061579.

The spelling of 18064109 in words is "eighteen million, sixty-four thousand, one hundred nine".