13201668 has 18 divisors (see below), whose sum is σ = 33370974. Its totient is φ = 4400544.

The previous prime is 13201651. The next prime is 13201679. The reversal of 13201668 is 86610231.

It can be written as a sum of positive squares in only one way, i.e., 7354944 + 5846724 = 2712^2 + 2418^2 .

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, 183321 + ... + 183392.

It is an arithmetic number, because the mean of its divisors is an integer number (1853943).

Almost surely, 2^13201668 is an apocalyptic number.

13201668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13201668 is an abundant number, since it is smaller than the sum of its proper divisors (20169306).

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

13201668 is a wasteful number, since it uses less digits than its factorization.

13201668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366723 (or 366718 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 13201668 is about 3633.4099686108. The cubic root of 13201668 is about 236.3431043130.

Adding to 13201668 its reverse (86610231), we get a palindrome (99811899).

The spelling of 13201668 in words is "thirteen million, two hundred one thousand, six hundred sixty-eight".