18118465 has 8 divisors (see below), whose sum is σ = 21770280. Its totient is φ = 14476032.

The previous prime is 18118367. The next prime is 18118469. The reversal of 18118465 is 56481181.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3625216 + 14493249 = 1904^2 + 3807^2 .

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 18118465 - 2⁷ = 18118337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18118465.

It is not an unprimeable number, because it can be changed into a prime (18118469) 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, 3031 + ... + 6739.

It is an arithmetic number, because the mean of its divisors is an integer number (2721285).

Almost surely, 2^18118465 is an apocalyptic number.

It is an amenable number.

18118465 is a deficient number, since it is larger than the sum of its proper divisors (3651815).

18118465 is an equidigital number, since it uses as much as digits as its factorization.

18118465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691.

The product of its digits is 7680, while the sum is 34.

The square root of 18118465 is about 4256.5790254616. The cubic root of 18118465 is about 262.6478199936.

The spelling of 18118465 in words is "eighteen million, one hundred eighteen thousand, four hundred sixty-five".