16842845 has 4 divisors (see below), whose sum is σ = 20211420. Its totient is φ = 13474272.

The previous prime is 16842821. The next prime is 16842851. The reversal of 16842845 is 54824861.

It is a happy number.

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 11580409 + 5262436 = 3403^2 + 2294^2 .

It is a cyclic number.

It is not a de Polignac number, because 16842845 - 2⁶ = 16842781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16842799 and 16842808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684280 + ... + 1684289.

It is an arithmetic number, because the mean of its divisors is an integer number (5052855).

Almost surely, 2^16842845 is an apocalyptic number.

It is an amenable number.

16842845 is a deficient number, since it is larger than the sum of its proper divisors (3368575).

16842845 is an equidigital number, since it uses as much as digits as its factorization.

16842845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368574.

The product of its digits is 61440, while the sum is 38.

The square root of 16842845 is about 4104.0035331369. The cubic root of 16842845 is about 256.3333720388. Note that the first 4 decimals are identical.

The spelling of 16842845 in words is "sixteen million, eight hundred forty-two thousand, eight hundred forty-five".