18008576 has 40 divisors (see below), whose sum is σ = 38116980. Its totient is φ = 8470528.

The previous prime is 18008539. The next prime is 18008579. The reversal of 18008576 is 67580081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17977600 + 30976 = 4240^2 + 176^2 .

It is not an unprimeable number, because it can be changed into a prime (18008579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7670 + ... + 9738.

Almost surely, 2^18008576 is an apocalyptic number.

18008576 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18008576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19058490).

18008576 is an abundant number, since it is smaller than the sum of its proper divisors (20108404).

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

18008576 is an equidigital number, since it uses as much as digits as its factorization.

18008576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 18008576 is about 4243.6512580560. The cubic root of 18008576 is about 262.1157540685.

The spelling of 18008576 in words is "eighteen million, eight thousand, five hundred seventy-six".