16634885 has 4 divisors (see below), whose sum is σ = 19961868. Its totient is φ = 13307904.

The previous prime is 16634881. The next prime is 16634897. The reversal of 16634885 is 58843661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58843661 = 4793 ⋅12277.

It can be written as a sum of positive squares in 2 ways, for example, as 13300609 + 3334276 = 3647^2 + 1826^2 .

It is a cyclic number.

It is not a de Polignac number, because 16634885 - 2² = 16634881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16634881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1663484 + ... + 1663493.

It is an arithmetic number, because the mean of its divisors is an integer number (4990467).

Almost surely, 2^16634885 is an apocalyptic number.

It is an amenable number.

16634885 is a deficient number, since it is larger than the sum of its proper divisors (3326983).

16634885 is an equidigital number, since it uses as much as digits as its factorization.

16634885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326982.

The product of its digits is 138240, while the sum is 41.

The square root of 16634885 is about 4078.5886039168. The cubic root of 16634885 is about 255.2740102115.

The spelling of 16634885 in words is "sixteen million, six hundred thirty-four thousand, eight hundred eighty-five".