16622845 has 4 divisors (see below), whose sum is σ = 19947420. Its totient is φ = 13298272.

The previous prime is 16622843. The next prime is 16622857. The reversal of 16622845 is 54822661.

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 3161284 + 13461561 = 1778^2 + 3669^2 .

It is a cyclic number.

It is not a de Polignac number, because 16622845 - 2¹ = 16622843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16622845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16622843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662280 + ... + 1662289.

It is an arithmetic number, because the mean of its divisors is an integer number (4986855).

Almost surely, 2^16622845 is an apocalyptic number.

It is an amenable number.

16622845 is a deficient number, since it is larger than the sum of its proper divisors (3324575).

16622845 is an equidigital number, since it uses as much as digits as its factorization.

16622845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324574.

The product of its digits is 23040, while the sum is 34.

The square root of 16622845 is about 4077.1123359554. The cubic root of 16622845 is about 255.2124079242.

The spelling of 16622845 in words is "sixteen million, six hundred twenty-two thousand, eight hundred forty-five".