16819844 has 6 divisors (see below), whose sum is σ = 29434734. Its totient is φ = 8409920.

The previous prime is 16819841. The next prime is 16819853. The reversal of 16819844 is 44891861.

It can be written as a sum of positive squares in only one way, i.e., 10758400 + 6061444 = 3280^2 + 2462^2 .

It is not an unprimeable number, because it can be changed into a prime (16819841) by changing a digit.

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 as a sum of consecutive naturals, namely, 2102477 + ... + 2102484.

It is an arithmetic number, because the mean of its divisors is an integer number (4905789).

Almost surely, 2^16819844 is an apocalyptic number.

It is an amenable number.

16819844 is a deficient number, since it is larger than the sum of its proper divisors (12614890).

16819844 is a wasteful number, since it uses less digits than its factorization.

16819844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204965 (or 4204963 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 16819844 is about 4101.2003121038. The cubic root of 16819844 is about 256.2166338472.

The spelling of 16819844 in words is "sixteen million, eight hundred nineteen thousand, eight hundred forty-four".