13111808 has 20 divisors (see below), whose sum is σ = 26199030. Its totient is φ = 6555648.

The previous prime is 13111789. The next prime is 13111831. The reversal of 13111808 is 80811131.

It can be written as a sum of positive squares in only one way, i.e., 6801664 + 6310144 = 2608^2 + 2512^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12293 + ... + 13316.

Almost surely, 2^13111808 is an apocalyptic number.

It is an amenable number.

13111808 is a deficient number, since it is larger than the sum of its proper divisors (13087222).

13111808 is an frugal number, since it uses more digits than its factorization.

13111808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25627 (or 25611 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 13111808 is about 3621.0230598548. The cubic root of 13111808 is about 235.8056429119.

Adding to 13111808 its reverse (80811131), we get a palindrome (93922939).

The spelling of 13111808 in words is "thirteen million, one hundred eleven thousand, eight hundred eight".