18027008 has 40 divisors (see below), whose sum is σ = 36422892. Its totient is φ = 8912896.

The previous prime is 18026959. The next prime is 18027011. The reversal of 18027008 is 80072081.

It can be written as a sum of positive squares in 2 ways, for example, as 15618304 + 2408704 = 3952^2 + 1552^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70016 + ... + 70272.

Almost surely, 2^18027008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18027008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18211446).

18027008 is an abundant number, since it is smaller than the sum of its proper divisors (18395884).

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

18027008 is an equidigital number, since it uses as much as digits as its factorization.

18027008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 18027008 is about 4245.8224173887. The cubic root of 18027008 is about 262.2051498136.

Adding to 18027008 its reverse (80072081), we get a palindrome (98099089).

The spelling of 18027008 in words is "eighteen million, twenty-seven thousand, eight".