18144315 has 24 divisors (see below), whose sum is σ = 35943648. Its totient is φ = 8294400.

The previous prime is 18144281. The next prime is 18144317. The reversal of 18144315 is 51344181.

18144315 = 211² + 212² + ... + 399².

It is a happy number.

It is not a de Polignac number, because 18144315 - 2⁸ = 18144059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18144317) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 28486 + ... + 29115.

It is an arithmetic number, because the mean of its divisors is an integer number (1497652).

Almost surely, 2^18144315 is an apocalyptic number.

18144315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18144315 is a deficient number, since it is larger than the sum of its proper divisors (17799333).

18144315 is a wasteful number, since it uses less digits than its factorization.

18144315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57619 (or 57616 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 18144315 is about 4259.6144191699. The cubic root of 18144315 is about 262.7726690508.

Adding to 18144315 its reverse (51344181), we get a palindrome (69488496).

The spelling of 18144315 in words is "eighteen million, one hundred forty-four thousand, three hundred fifteen".