18326965 has 4 divisors (see below), whose sum is σ = 21992364. Its totient is φ = 14661568.

The previous prime is 18326911. The next prime is 18326977. The reversal of 18326965 is 56962381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6589489 + 11737476 = 2567^2 + 3426^2 .

It is a cyclic number.

It is not a de Polignac number, because 18326965 - 2¹⁵ = 18294197 is a prime.

It is a super-2 number, since 2×18326965² = 671755292222450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1832692 + ... + 1832701.

It is an arithmetic number, because the mean of its divisors is an integer number (5498091).

Almost surely, 2^18326965 is an apocalyptic number.

It is an amenable number.

18326965 is a deficient number, since it is larger than the sum of its proper divisors (3665399).

18326965 is an equidigital number, since it uses as much as digits as its factorization.

18326965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665398.

The product of its digits is 77760, while the sum is 40.

The square root of 18326965 is about 4281.0004671805. Note that the first 3 decimals coincide. The cubic root of 18326965 is about 263.6514617340.

It can be divided in two parts, 18326 and 965, that added together give a palindrome (19291).

The spelling of 18326965 in words is "eighteen million, three hundred twenty-six thousand, nine hundred sixty-five".