16845813 has 10 divisors (see below), whose sum is σ = 25164854. Its totient is φ = 11230488.

The previous prime is 16845811. The next prime is 16845823. The reversal of 16845813 is 31854861.

It can be written as a sum of positive squares in only one way, i.e., 15539364 + 1306449 = 3942^2 + 1143^2 .

It is not a de Polignac number, because 16845813 - 2¹ = 16845811 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 (16845811) 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 9 ways as a sum of consecutive naturals, for example, 103906 + ... + 104067.

Almost surely, 2^16845813 is an apocalyptic number.

It is an amenable number.

16845813 is a deficient number, since it is larger than the sum of its proper divisors (8319041).

16845813 is an equidigital number, since it uses as much as digits as its factorization.

16845813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207985 (or 207976 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 16845813 is about 4104.3651153376. The cubic root of 16845813 is about 256.3484279426.

The spelling of 16845813 in words is "sixteen million, eight hundred forty-five thousand, eight hundred thirteen".