13203681 has 8 divisors (see below), whose sum is σ = 18034464. Its totient is φ = 8587680.

The previous prime is 13203677. The next prime is 13203683. The reversal of 13203681 is 18630231.

13203681 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13203681 - 2² = 13203677 is a prime.

It is a super-2 number, since 2×13203681² = 348674383899522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13203683) 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, 53551 + ... + 53796.

It is an arithmetic number, because the mean of its divisors is an integer number (2254308).

Almost surely, 2^13203681 is an apocalyptic number.

It is an amenable number.

13203681 is a deficient number, since it is larger than the sum of its proper divisors (4830783).

13203681 is a wasteful number, since it uses less digits than its factorization.

13203681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107391.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 13203681 is about 3633.6869705576. The cubic root of 13203681 is about 236.3551162923.

The spelling of 13203681 in words is "thirteen million, two hundred three thousand, six hundred eighty-one".