18085069 has 6 divisors (see below), whose sum is σ = 18517326. Its totient is φ = 17662680.

The previous prime is 18085057. The next prime is 18085073. The reversal of 18085069 is 96058081.

It can be written as a sum of positive squares in only one way, i.e., 14976900 + 3108169 = 3870^2 + 1763^2 .

It is not a de Polignac number, because 18085069 - 2¹⁷ = 17953997 is a prime.

It is a super-2 number, since 2×18085069² = 654139441469522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18085019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3042 + ... + 6739.

It is an arithmetic number, because the mean of its divisors is an integer number (3086221).

Almost surely, 2^18085069 is an apocalyptic number.

It is an amenable number.

18085069 is a deficient number, since it is larger than the sum of its proper divisors (432257).

18085069 is an frugal number, since it uses more digits than its factorization.

18085069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9867 (or 9824 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 18085069 is about 4252.6543475810. The cubic root of 18085069 is about 262.4863497059.

The spelling of 18085069 in words is "eighteen million, eighty-five thousand, sixty-nine".