16604403 has 8 divisors (see below), whose sum is σ = 22228416. Its totient is φ = 11025000.

The previous prime is 16604389. The next prime is 16604417. The reversal of 16604403 is 30440661.

It is an interprime number because it is at equal distance from previous prime (16604389) and next prime (16604417).

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

It is not a de Polignac number, because 16604403 - 2⁴ = 16604387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16604473) 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 in 7 ways as a sum of consecutive naturals, for example, 10273 + ... + 11778.

It is an arithmetic number, because the mean of its divisors is an integer number (2778552).

Almost surely, 2^16604403 is an apocalyptic number.

16604403 is a deficient number, since it is larger than the sum of its proper divisors (5624013).

16604403 is a wasteful number, since it uses less digits than its factorization.

16604403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22305.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 16604403 is about 4074.8500585911. The cubic root of 16604403 is about 255.1179922998.

The spelling of 16604403 in words is "sixteen million, six hundred four thousand, four hundred three".