18144529 has 8 divisors (see below), whose sum is σ = 19743080. Its totient is φ = 16574976.

The previous prime is 18144527. The next prime is 18144551. The reversal of 18144529 is 92544181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 65025 + 18079504 = 255^2 + 4252^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18144529 - 2¹ = 18144527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18144494 and 18144503.

It is not an unprimeable number, because it can be changed into a prime (18144521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5934 + ... + 8455.

It is an arithmetic number, because the mean of its divisors is an integer number (2467885).

Almost surely, 2^18144529 is an apocalyptic number.

It is an amenable number.

18144529 is a deficient number, since it is larger than the sum of its proper divisors (1598551).

18144529 is a wasteful number, since it uses less digits than its factorization.

18144529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14499.

The product of its digits is 11520, while the sum is 34.

The square root of 18144529 is about 4259.6395387403. The cubic root of 18144529 is about 262.7737021225.

The spelling of 18144529 in words is "eighteen million, one hundred forty-four thousand, five hundred twenty-nine".