16204385 has 4 divisors (see below), whose sum is σ = 19445268. Its totient is φ = 12963504.

The previous prime is 16204369. The next prime is 16204393. The reversal of 16204385 is 58340261.

16204385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58340261 = 7 ⋅8334323.

It can be written as a sum of positive squares in 2 ways, for example, as 4596736 + 11607649 = 2144^2 + 3407^2 .

It is a cyclic number.

It is not a de Polignac number, because 16204385 - 2⁴ = 16204369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620434 + ... + 1620443.

It is an arithmetic number, because the mean of its divisors is an integer number (4861317).

Almost surely, 2^16204385 is an apocalyptic number.

It is an amenable number.

16204385 is a deficient number, since it is larger than the sum of its proper divisors (3240883).

16204385 is an equidigital number, since it uses as much as digits as its factorization.

16204385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240882.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 16204385 is about 4025.4670536473. The cubic root of 16204385 is about 253.0526274831.

The spelling of 16204385 in words is "sixteen million, two hundred four thousand, three hundred eighty-five".