16044021 has 48 divisors (see below), whose sum is σ = 28217280. Its totient is φ = 8981280.

The previous prime is 16044011. The next prime is 16044023. The reversal of 16044021 is 12044061.

16044021 is a `hidden beast` number, since 1 + 604 + 40 + 21 = 666.

It is not a de Polignac number, because 16044021 - 2⁷ = 16043893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16043985 and 16044003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16044023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88551 + ... + 88731.

It is an arithmetic number, because the mean of its divisors is an integer number (587860).

Almost surely, 2^16044021 is an apocalyptic number.

It is an amenable number.

16044021 is a deficient number, since it is larger than the sum of its proper divisors (12173259).

16044021 is a wasteful number, since it uses less digits than its factorization.

16044021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 16044021 is about 4005.4988453375. The cubic root of 16044021 is about 252.2150941323.

Adding to 16044021 its reverse (12044061), we get a palindrome (28088082).

It can be divided in two parts, 160440 and 21, that added together give a triangular number (160461 = T₅₆₆).

The spelling of 16044021 in words is "sixteen million, forty-four thousand, twenty-one".