18065418 has 48 divisors (see below), whose sum is σ = 43037280. Its totient is φ = 5037984.

The previous prime is 18065417. The next prime is 18065449. The reversal of 18065418 is 81456081.

18065418 is a modest number, since divided by 5418 gives 1806 as remainder.

It is not an unprimeable number, because it can be changed into a prime (18065417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11928 + ... + 13356.

It is an arithmetic number, because the mean of its divisors is an integer number (896610).

Almost surely, 2^18065418 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18065418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21518640).

18065418 is an abundant number, since it is smaller than the sum of its proper divisors (24971862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18065418 is a wasteful number, since it uses less digits than its factorization.

18065418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 18065418 is about 4250.3432802540. The cubic root of 18065418 is about 262.3912438364.

The spelling of 18065418 in words is "eighteen million, sixty-five thousand, four hundred eighteen".