18663344 has 40 divisors (see below), whose sum is σ = 41925888. Its totient is φ = 7882560.

The previous prime is 18663341. The next prime is 18663347. The reversal of 18663344 is 44336681.

It is an interprime number because it is at equal distance from previous prime (18663341) and next prime (18663347).

It is not an unprimeable number, because it can be changed into a prime (18663341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6779 + ... + 9125.

Almost surely, 2^18663344 is an apocalyptic number.

18663344 is a gapful number since it is divisible by the number (14) 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 18663344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20962944).

18663344 is an abundant number, since it is smaller than the sum of its proper divisors (23262544).

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

18663344 is a wasteful number, since it uses less digits than its factorization.

18663344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433 (or 2427 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 18663344 is about 4320.1092578776. The cubic root of 18663344 is about 265.2547402106.

The spelling of 18663344 in words is "eighteen million, six hundred sixty-three thousand, three hundred forty-four".