16812205 has 4 divisors (see below), whose sum is σ = 20174652. Its totient is φ = 13449760.

The previous prime is 16812203. The next prime is 16812221. The reversal of 16812205 is 50221861.

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 6456681 + 10355524 = 2541^2 + 3218^2 .

It is not a de Polignac number, because 16812205 - 2¹ = 16812203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16812205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16812203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1681216 + ... + 1681225.

It is an arithmetic number, because the mean of its divisors is an integer number (5043663).

Almost surely, 2^16812205 is an apocalyptic number.

It is an amenable number.

16812205 is a deficient number, since it is larger than the sum of its proper divisors (3362447).

16812205 is an equidigital number, since it uses as much as digits as its factorization.

16812205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362446.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 16812205 is about 4100.2688936215. The cubic root of 16812205 is about 256.1778396854.

The spelling of 16812205 in words is "sixteen million, eight hundred twelve thousand, two hundred five".