18008416 has 12 divisors (see below), whose sum is σ = 35454132. Its totient is φ = 9004192.

The previous prime is 18008413. The next prime is 18008467. The reversal of 18008416 is 61480081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18008413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281350 + ... + 281413.

It is an arithmetic number, because the mean of its divisors is an integer number (2954511).

Almost surely, 2^18008416 is an apocalyptic number.

18008416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18008416 is a deficient number, since it is larger than the sum of its proper divisors (17445716).

18008416 is an equidigital number, since it uses as much as digits as its factorization.

18008416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562773 (or 562765 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18008416 is about 4243.6324063236. The cubic root of 18008416 is about 262.1149777968.

Adding to 18008416 its reverse (61480081), we get a palindrome (79488497).

The spelling of 18008416 in words is "eighteen million, eight thousand, four hundred sixteen".