16827921 has 48 divisors (see below), whose sum is σ = 28005120. Its totient is φ = 9646560.

The previous prime is 16827919. The next prime is 16827931. The reversal of 16827921 is 12972861.

It is not a de Polignac number, because 16827921 - 2¹ = 16827919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16827931) 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 47 ways as a sum of consecutive naturals, for example, 251130 + ... + 251196.

It is an arithmetic number, because the mean of its divisors is an integer number (583440).

Almost surely, 2^16827921 is an apocalyptic number.

16827921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16827921 is a deficient number, since it is larger than the sum of its proper divisors (11177199).

16827921 is a wasteful number, since it uses less digits than its factorization.

16827921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 183 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 16827921 is about 4102.1849056326. The cubic root of 16827921 is about 256.2576395898.

The spelling of 16827921 in words is "sixteen million, eight hundred twenty-seven thousand, nine hundred twenty-one".