16320563 has 16 divisors (see below), whose sum is σ = 19749120. Its totient is φ = 13175136.

The previous prime is 16320529. The next prime is 16320569. The reversal of 16320563 is 36502361.

It is a cyclic number.

It is not a de Polignac number, because 16320563 - 2¹⁶ = 16255027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16320569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36620 + ... + 37062.

It is an arithmetic number, because the mean of its divisors is an integer number (1234320).

Almost surely, 2^16320563 is an apocalyptic number.

16320563 is a deficient number, since it is larger than the sum of its proper divisors (3428557).

16320563 is a wasteful number, since it uses less digits than its factorization.

16320563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 16320563 is about 4039.8716563772. The cubic root of 16320563 is about 253.6559449845.

The spelling of 16320563 in words is "sixteen million, three hundred twenty thousand, five hundred sixty-three".