18012065 has 8 divisors (see below), whose sum is σ = 21708648. Its totient is φ = 14346880.

The previous prime is 18012047. The next prime is 18012067. The reversal of 18012065 is 56021081.

It can be written as a sum of positive squares in 4 ways, for example, as 529 + 18011536 = 23^2 + 4244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18012065 - 2⁸ = 18011809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18012065.

It is not an unprimeable number, because it can be changed into a prime (18012067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6566 + ... + 8895.

It is an arithmetic number, because the mean of its divisors is an integer number (2713581).

Almost surely, 2^18012065 is an apocalyptic number.

It is an amenable number.

18012065 is a deficient number, since it is larger than the sum of its proper divisors (3696583).

18012065 is a wasteful number, since it uses less digits than its factorization.

18012065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15699.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 18012065 is about 4244.0623228223. The cubic root of 18012065 is about 262.1326805005.

The spelling of 18012065 in words is "eighteen million, twelve thousand, sixty-five".