16808105 has 4 divisors (see below), whose sum is σ = 20169732. Its totient is φ = 13446480.

The previous prime is 16808059. The next prime is 16808111. The reversal of 16808105 is 50180861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50180861 = 863 ⋅58147.

It can be written as a sum of positive squares in 2 ways, for example, as 7123561 + 9684544 = 2669^2 + 3112^2 .

It is not a de Polignac number, because 16808105 - 2⁶ = 16808041 is a prime.

It is a Duffinian number.

It is a Curzon 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, 1680806 + ... + 1680815.

It is an arithmetic number, because the mean of its divisors is an integer number (5042433).

Almost surely, 2^16808105 is an apocalyptic number.

It is an amenable number.

16808105 is a deficient number, since it is larger than the sum of its proper divisors (3361627).

16808105 is an equidigital number, since it uses as much as digits as its factorization.

16808105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361626.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 16808105 is about 4099.7688959257. The cubic root of 16808105 is about 256.1570132573.

Adding to 16808105 its reverse (50180861), we get a palindrome (66988966).

The spelling of 16808105 in words is "sixteen million, eight hundred eight thousand, one hundred five".