18016416 has 144 divisors (see below), whose sum is σ = 57552768. Its totient is φ = 5343360.

The previous prime is 18016409. The next prime is 18016421. The reversal of 18016416 is 61461081.

18016416 is a `hidden beast` number, since 18 + 0 + 1 + 641 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 18016416.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 383305 + ... + 383351.

It is an arithmetic number, because the mean of its divisors is an integer number (399672).

Almost surely, 2^18016416 is an apocalyptic number.

18016416 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 18016416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28776384).

18016416 is an abundant number, since it is smaller than the sum of its proper divisors (39536352).

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

18016416 is a wasteful number, since it uses less digits than its factorization.

18016416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 63 counting only the distinct ones).

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

The square root of 18016416 is about 4244.5748903748. The cubic root of 18016416 is about 262.1537857517.

Adding to 18016416 its reverse (61461081), we get a palindrome (79477497).

The spelling of 18016416 in words is "eighteen million, sixteen thousand, four hundred sixteen".