13821326 has 16 divisors (see below), whose sum is σ = 21168000. Its totient is φ = 6766968.

The previous prime is 13821307. The next prime is 13821329. The reversal of 13821326 is 62312831.

It is a junction number, because it is equal to n+sod(n) for n = 13821295 and 13821304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13821329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22775 + ... + 23373.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^13821326 is an apocalyptic number.

13821326 is a deficient number, since it is larger than the sum of its proper divisors (7346674).

13821326 is a wasteful number, since it uses less digits than its factorization.

13821326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823.

The product of its digits is 1728, while the sum is 26.

The square root of 13821326 is about 3717.7043992227. The cubic root of 13821326 is about 239.9845244651.

The spelling of 13821326 in words is "thirteen million, eight hundred twenty-one thousand, three hundred twenty-six".