18002065 has 8 divisors (see below), whose sum is σ = 22873320. Its totient is φ = 13554432.

The previous prime is 18002059. The next prime is 18002111. The reversal of 18002065 is 56020081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8620096 + 9381969 = 2936^2 + 3063^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18002065 - 2¹³ = 17993873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105810 + ... + 105979.

It is an arithmetic number, because the mean of its divisors is an integer number (2859165).

Almost surely, 2^18002065 is an apocalyptic number.

It is an amenable number.

18002065 is a deficient number, since it is larger than the sum of its proper divisors (4871255).

18002065 is a wasteful number, since it uses less digits than its factorization.

18002065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211811.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18002065 is about 4242.8840427238. The cubic root of 18002065 is about 262.0841609469.

The spelling of 18002065 in words is "eighteen million, two thousand, sixty-five".