16446845 has 4 divisors (see below), whose sum is σ = 19736220. Its totient is φ = 13157472.

The previous prime is 16446841. The next prime is 16446847. The reversal of 16446845 is 54864461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54864461 = 97 ⋅565613.

It can be written as a sum of positive squares in 2 ways, for example, as 4866436 + 11580409 = 2206^2 + 3403^2 .

It is a cyclic number.

It is not a de Polignac number, because 16446845 - 2² = 16446841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16446799 and 16446808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16446841) 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, 1644680 + ... + 1644689.

It is an arithmetic number, because the mean of its divisors is an integer number (4934055).

Almost surely, 2^16446845 is an apocalyptic number.

It is an amenable number.

16446845 is a deficient number, since it is larger than the sum of its proper divisors (3289375).

16446845 is an equidigital number, since it uses as much as digits as its factorization.

16446845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289374.

The product of its digits is 92160, while the sum is 38.

The square root of 16446845 is about 4055.4709960743. The cubic root of 16446845 is about 254.3084942860.

The spelling of 16446845 in words is "sixteen million, four hundred forty-six thousand, eight hundred forty-five".