18140465 has 8 divisors (see below), whose sum is σ = 24878400. Its totient is φ = 12439152.

The previous prime is 18140461. The next prime is 18140467. The reversal of 18140465 is 56404181.

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 18140465 - 2² = 18140461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18140461) 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, 259115 + ... + 259184.

It is an arithmetic number, because the mean of its divisors is an integer number (3109800).

Almost surely, 2^18140465 is an apocalyptic number.

It is an amenable number.

18140465 is a deficient number, since it is larger than the sum of its proper divisors (6737935).

18140465 is an equidigital number, since it uses as much as digits as its factorization.

18140465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518311.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18140465 is about 4259.1624763561. The cubic root of 18140465 is about 262.7540820290.

The spelling of 18140465 in words is "eighteen million, one hundred forty thousand, four hundred sixty-five".