18144504 has 144 divisors (see below), whose sum is σ = 59131800. Its totient is φ = 5007744.

The previous prime is 18144481. The next prime is 18144521. The reversal of 18144504 is 40544181.

It is a happy number.

18144504 is a `hidden beast` number, since 18 + 144 + 504 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130467 + ... + 130605.

Almost surely, 2^18144504 is an apocalyptic number.

18144504 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 18144504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29565900).

18144504 is an abundant number, since it is smaller than the sum of its proper divisors (40987296).

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

18144504 is a wasteful number, since it uses less digits than its factorization.

18144504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 18144504 is about 4259.6366042187. The cubic root of 18144504 is about 262.7735814369.

Adding to 18144504 its reverse (40544181), we get a palindrome (58688685).

It can be divided in two parts, 18144 and 504, that multiplied together give a square (9144576 = 3024²).

The spelling of 18144504 in words is "eighteen million, one hundred forty-four thousand, five hundred four".