18416016 has 120 divisors (see below), whose sum is σ = 55710720. Its totient is φ = 5660928.

The previous prime is 18416003. The next prime is 18416017. The reversal of 18416016 is 61061481.

18416016 is a `hidden beast` number, since 18 + 41 + 601 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (18416017) 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 23 ways as a sum of consecutive naturals, for example, 144945 + ... + 145071.

It is an arithmetic number, because the mean of its divisors is an integer number (464256).

Almost surely, 2^18416016 is an apocalyptic number.

18416016 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 18416016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27855360).

18416016 is an abundant number, since it is smaller than the sum of its proper divisors (37294704).

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

18416016 is a wasteful number, since it uses less digits than its factorization.

18416016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18416016 is about 4291.3885864601. The cubic root of 18416016 is about 264.0778007613.

Adding to 18416016 its reverse (61061481), we get a palindrome (79477497).

The spelling of 18416016 in words is "eighteen million, four hundred sixteen thousand, sixteen".