18144665 has 16 divisors (see below), whose sum is σ = 27146880. Its totient is φ = 11310720.

The previous prime is 18144619. The next prime is 18144701. The reversal of 18144665 is 56644181.

It is not a de Polignac number, because 18144665 - 2¹² = 18140569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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 15 ways as a sum of consecutive naturals, for example, 23180 + ... + 23949.

It is an arithmetic number, because the mean of its divisors is an integer number (1696680).

Almost surely, 2^18144665 is an apocalyptic number.

It is an amenable number.

18144665 is a deficient number, since it is larger than the sum of its proper divisors (9002215).

18144665 is a wasteful number, since it uses less digits than its factorization.

18144665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47152.

The product of its digits is 23040, while the sum is 35.

The square root of 18144665 is about 4259.6555025025. The cubic root of 18144665 is about 262.7743586497.

The spelling of 18144665 in words is "eighteen million, one hundred forty-four thousand, six hundred sixty-five".