13003668 has 18 divisors (see below), whose sum is σ = 32870474. Its totient is φ = 4334544.

The previous prime is 13003643. The next prime is 13003699. The reversal of 13003668 is 86630031.

13003668 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 only one way, i.e., 11370384 + 1633284 = 3372^2 + 1278^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180571 + ... + 180642.

Almost surely, 2^13003668 is an apocalyptic number.

13003668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13003668 is an abundant number, since it is smaller than the sum of its proper divisors (19866806).

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

13003668 is a wasteful number, since it uses less digits than its factorization.

13003668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361223 (or 361218 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 13003668 is about 3606.0598996689. The cubic root of 13003668 is about 235.1555812967.

Adding to 13003668 its reverse (86630031), we get a palindrome (99633699).

The spelling of 13003668 in words is "thirteen million, three thousand, six hundred sixty-eight".