18041305 has 8 divisors (see below), whose sum is σ = 21775752. Its totient is φ = 14348928.

The previous prime is 18041263. The next prime is 18041323. The reversal of 18041305 is 50314081.

It can be written as a sum of positive squares in 4 ways, for example, as 10686361 + 7354944 = 3269^2 + 2712^2 .

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 18041305 - 2¹¹ = 18039257 is a prime.

It is a super-2 number, since 2×18041305² = 650977372206050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9564 + ... + 11293.

It is an arithmetic number, because the mean of its divisors is an integer number (2721969).

Almost surely, 2^18041305 is an apocalyptic number.

It is an amenable number.

18041305 is a deficient number, since it is larger than the sum of its proper divisors (3734447).

18041305 is a wasteful number, since it uses less digits than its factorization.

18041305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21035.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18041305 is about 4247.5057386659. The cubic root of 18041305 is about 262.2744487314.

Adding to 18041305 its reverse (50314081), we get a palindrome (68355386).

The spelling of 18041305 in words is "eighteen million, forty-one thousand, three hundred five".