13081808 has 20 divisors (see below), whose sum is σ = 25610340. Its totient is φ = 6472704.

The previous prime is 13081807. The next prime is 13081841. The reversal of 13081808 is 80818031.

It is a happy number.

13081808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3888784 + 9193024 = 1972^2 + 3032^2 .

It is a super-2 number, since 2×13081808² = 342267401097728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081801) 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, 2663 + ... + 5766.

It is an arithmetic number, because the mean of its divisors is an integer number (1280517).

Almost surely, 2^13081808 is an apocalyptic number.

It is an amenable number.

13081808 is a deficient number, since it is larger than the sum of its proper divisors (12528532).

13081808 is an equidigital number, since it uses as much as digits as its factorization.

13081808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8534 (or 8528 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 13081808 is about 3616.8782119391. The cubic root of 13081808 is about 235.6256633744.

Adding to 13081808 its reverse (80818031), we get a palindrome (93899839).

The spelling of 13081808 in words is "thirteen million, eighty-one thousand, eight hundred eight".