18368065 has 4 divisors (see below), whose sum is σ = 22041684. Its totient is φ = 14694448.

The previous prime is 18368039. The next prime is 18368069. The reversal of 18368065 is 56086381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56086381 = 13 ⋅4314337.

It can be written as a sum of positive squares in 2 ways, for example, as 8708401 + 9659664 = 2951^2 + 3108^2 .

It is a cyclic number.

It is not a de Polignac number, because 18368065 - 2⁵ = 18368033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18368069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836802 + ... + 1836811.

It is an arithmetic number, because the mean of its divisors is an integer number (5510421).

Almost surely, 2^18368065 is an apocalyptic number.

It is an amenable number.

18368065 is a deficient number, since it is larger than the sum of its proper divisors (3673619).

18368065 is an equidigital number, since it uses as much as digits as its factorization.

18368065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673618.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18368065 is about 4285.7980587051. The cubic root of 18368065 is about 263.8484025957.

The spelling of 18368065 in words is "eighteen million, three hundred sixty-eight thousand, sixty-five".