18144565 has 8 divisors (see below), whose sum is σ = 22142880. Its totient is φ = 14269392.

The previous prime is 18144557. The next prime is 18144571. The reversal of 18144565 is 56544181.

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 18144565 - 2³ = 18144557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18144565.

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 7 ways as a sum of consecutive naturals, for example, 30459 + ... + 31048.

It is an arithmetic number, because the mean of its divisors is an integer number (2767860).

Almost surely, 2^18144565 is an apocalyptic number.

It is an amenable number.

18144565 is a deficient number, since it is larger than the sum of its proper divisors (3998315).

18144565 is an equidigital number, since it uses as much as digits as its factorization.

18144565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61571.

The product of its digits is 19200, while the sum is 34.

The square root of 18144565 is about 4259.6437644479. The cubic root of 18144565 is about 262.7738759094.

The spelling of 18144565 in words is "eighteen million, one hundred forty-four thousand, five hundred sixty-five".