18303144 has 64 divisors (see below), whose sum is σ = 48023040. Its totient is φ = 5806080.

The previous prime is 18303143. The next prime is 18303149. The reversal of 18303144 is 44130381.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (18303143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54144 + ... + 54480.

It is an arithmetic number, because the mean of its divisors is an integer number (750360).

Almost surely, 2^18303144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18303144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24011520).

18303144 is an abundant number, since it is smaller than the sum of its proper divisors (29719896).

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

18303144 is a wasteful number, since it uses less digits than its factorization.

18303144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 18303144 is about 4278.2173857811. The cubic root of 18303144 is about 263.5371826831.

The spelling of 18303144 in words is "eighteen million, three hundred three thousand, one hundred forty-four".