18748416 has 88 divisors (see below), whose sum is σ = 53058240. Its totient is φ = 5865472.

The previous prime is 18748403. The next prime is 18748417. The reversal of 18748416 is 61484781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18748417) 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 7 ways as a sum of consecutive naturals, for example, 52045 + ... + 52403.

Almost surely, 2^18748416 is an apocalyptic number.

18748416 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 18748416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26529120).

18748416 is an abundant number, since it is smaller than the sum of its proper divisors (34309824).

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

18748416 is a wasteful number, since it uses less digits than its factorization.

18748416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 381 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 18748416 is about 4329.9441104938. The cubic root of 18748416 is about 265.6571609686.

The spelling of 18748416 in words is "eighteen million, seven hundred forty-eight thousand, four hundred sixteen".