18498816 has 216 divisors, whose sum is σ = 64623104. Its totient is φ = 4976640.

The previous prime is 18498811. The next prime is 18498817. The reversal of 18498816 is 61889481.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18498811) 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, 499950 + ... + 499986.

Almost surely, 2^18498816 is an apocalyptic number.

18498816 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 18498816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32311552).

18498816 is an abundant number, since it is smaller than the sum of its proper divisors (46124288).

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

18498816 is a wasteful number, since it uses less digits than its factorization.

18498816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 80 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 18498816 is about 4301.0249941148. The cubic root of 18498816 is about 264.4729813037.

The spelling of 18498816 in words is "eighteen million, four hundred ninety-eight thousand, eight hundred sixteen".