16822809 has 40 divisors (see below), whose sum is σ = 28052640. Its totient is φ = 9984384.

The previous prime is 16822769. The next prime is 16822823. The reversal of 16822809 is 90822861.

It is not a de Polignac number, because 16822809 - 2¹¹ = 16820761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16822849) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25842 + ... + 26484.

It is an arithmetic number, because the mean of its divisors is an integer number (701316).

Almost surely, 2^16822809 is an apocalyptic number.

16822809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16822809 is a deficient number, since it is larger than the sum of its proper divisors (11229831).

16822809 is a wasteful number, since it uses less digits than its factorization.

16822809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 16822809 is about 4101.5617757142. The cubic root of 16822809 is about 256.2316882413.

The spelling of 16822809 in words is "sixteen million, eight hundred twenty-two thousand, eight hundred nine".