16904045 has 4 divisors (see below), whose sum is σ = 20284860. Its totient is φ = 13523232.

The previous prime is 16904039. The next prime is 16904059. The reversal of 16904045 is 54040961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6651241 + 10252804 = 2579^2 + 3202^2 .

It is a cyclic number.

It is not a de Polignac number, because 16904045 - 2¹⁶ = 16838509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16903999 and 16904017.

It is a congruent 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, 1690400 + ... + 1690409.

It is an arithmetic number, because the mean of its divisors is an integer number (5071215).

Almost surely, 2^16904045 is an apocalyptic number.

It is an amenable number.

16904045 is a deficient number, since it is larger than the sum of its proper divisors (3380815).

16904045 is an equidigital number, since it uses as much as digits as its factorization.

16904045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380814.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16904045 is about 4111.4529062121. The cubic root of 16904045 is about 256.6434669160.

The spelling of 16904045 in words is "sixteen million, nine hundred four thousand, forty-five".