16823812 has 12 divisors (see below), whose sum is σ = 31173660. Its totient is φ = 7917056.

The previous prime is 16823809. The next prime is 16823813. The reversal of 16823812 is 21832861.

It can be written as a sum of positive squares in 2 ways, for example, as 15492096 + 1331716 = 3936^2 + 1154^2 .

It is a super-2 number, since 2×16823812² = 566081300422688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16823813) 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 in 3 ways as a sum of consecutive naturals, for example, 123637 + ... + 123772.

It is an arithmetic number, because the mean of its divisors is an integer number (2597805).

Almost surely, 2^16823812 is an apocalyptic number.

It is an amenable number.

16823812 is a deficient number, since it is larger than the sum of its proper divisors (14349848).

16823812 is a wasteful number, since it uses less digits than its factorization.

16823812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247430 (or 247428 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 16823812 is about 4101.6840443896. The cubic root of 16823812 is about 256.2367804404.

The spelling of 16823812 in words is "sixteen million, eight hundred twenty-three thousand, eight hundred twelve".