18332416 has 36 divisors (see below), whose sum is σ = 38529400. Its totient is φ = 8681472.

The previous prime is 18332411. The next prime is 18332423. The reversal of 18332416 is 61423381.

It is a super-3 number, since 3×18332416³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18332411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2980 + ... + 6748.

Almost surely, 2^18332416 is an apocalyptic number.

18332416 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 18332416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19264700).

18332416 is an abundant number, since it is smaller than the sum of its proper divisors (20196984).

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

18332416 is an equidigital number, since it uses as much as digits as its factorization.

18332416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804 (or 3790 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 18332416 is about 4281.6370700936. The cubic root of 18332416 is about 263.6775984794.

Adding to 18332416 its reverse (61423381), we get a palindrome (79755797).

The spelling of 18332416 in words is "eighteen million, three hundred thirty-two thousand, four hundred sixteen".