13821603 has 16 divisors (see below), whose sum is σ = 19315200. Its totient is φ = 8779680.

The previous prime is 13821589. The next prime is 13821637. The reversal of 13821603 is 30612831.

It is not a de Polignac number, because 13821603 - 2⁵ = 13821571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13821653) 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 15 ways as a sum of consecutive naturals, for example, 5868 + ... + 7878.

It is an arithmetic number, because the mean of its divisors is an integer number (1207200).

Almost surely, 2^13821603 is an apocalyptic number.

13821603 is a deficient number, since it is larger than the sum of its proper divisors (5493597).

13821603 is a wasteful number, since it uses less digits than its factorization.

13821603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122.

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

The square root of 13821603 is about 3717.7416532083. The cubic root of 13821603 is about 239.9861276704.

The spelling of 13821603 in words is "thirteen million, eight hundred twenty-one thousand, six hundred three".