18480005 has 4 divisors (see below), whose sum is σ = 22176012. Its totient is φ = 14784000.

The previous prime is 18480001. The next prime is 18480029. The reversal of 18480005 is 50008481.

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 12013156 + 6466849 = 3466^2 + 2543^2 .

It is not a de Polignac number, because 18480005 - 2² = 18480001 is a prime.

It is a super-3 number, since 3×18480005³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18480001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1847996 + ... + 1848005.

It is an arithmetic number, because the mean of its divisors is an integer number (5544003).

Almost surely, 2^18480005 is an apocalyptic number.

It is an amenable number.

18480005 is a deficient number, since it is larger than the sum of its proper divisors (3696007).

18480005 is an equidigital number, since it uses as much as digits as its factorization.

18480005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696006.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 18480005 is about 4298.8376335935. The cubic root of 18480005 is about 264.3833055010.

Adding to 18480005 its reverse (50008481), we get a palindrome (68488486).

The spelling of 18480005 in words is "eighteen million, four hundred eighty thousand, five".