16800821603 has 2 divisors, whose sum is σ = 16800821604. Its totient is φ = 16800821602.

The previous prime is 16800821579. The next prime is 16800821621. The reversal of 16800821603 is 30612800861.

16800821603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16800821603 - 2⁸ = 16800821347 is a prime.

It is not a weakly prime, because it can be changed into another prime (16800821203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8400410801 + 8400410802.

It is an arithmetic number, because the mean of its divisors is an integer number (8400410802).

Almost surely, 2^16800821603 is an apocalyptic number.

16800821603 is a deficient number, since it is larger than the sum of its proper divisors (1).

16800821603 is an equidigital number, since it uses as much as digits as its factorization.

16800821603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 16800821603 in words is "sixteen billion, eight hundred million, eight hundred twenty-one thousand, six hundred three".