13181808 has 40 divisors (see below), whose sum is σ = 34783488. Its totient is φ = 4299712.

The previous prime is 13181771. The next prime is 13181809. The reversal of 13181808 is 80818131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13181809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666 + ... + 5177.

Almost surely, 2^13181808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13181808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17391744).

13181808 is an abundant number, since it is smaller than the sum of its proper divisors (21601680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13181808 is a wasteful number, since it uses less digits than its factorization.

13181808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5901 (or 5895 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 13181808 is about 3630.6759701191. The cubic root of 13181808 is about 236.2245301620.

Adding to 13181808 its reverse (80818131), we get a palindrome (93999939).

The spelling of 13181808 in words is "thirteen million, one hundred eighty-one thousand, eight hundred eight".