18944016 has 80 divisors (see below), whose sum is σ = 60246144. Its totient is φ = 4995072.

The previous prime is 18943999. The next prime is 18944017. The reversal of 18944016 is 61044981.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18944017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2200 + ... + 6536.

Almost surely, 2^18944016 is an apocalyptic number.

18944016 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 18944016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30123072).

18944016 is an abundant number, since it is smaller than the sum of its proper divisors (41302128).

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

18944016 is a wasteful number, since it uses less digits than its factorization.

18944016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368 (or 4362 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18944016 is about 4352.4724008315. The cubic root of 18944016 is about 266.5778231817.

Adding to 18944016 its reverse (61044981), we get a palindrome (79988997).

The spelling of 18944016 in words is "eighteen million, nine hundred forty-four thousand, sixteen".