16027021 has 4 divisors (see below), whose sum is σ = 16723872. Its totient is φ = 15330172.

The previous prime is 16027009. The next prime is 16027027. The reversal of 16027021 is 12072061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16027021 - 2⁹ = 16026509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16027021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16027027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348391 + ... + 348436.

It is an arithmetic number, because the mean of its divisors is an integer number (4180968).

Almost surely, 2^16027021 is an apocalyptic number.

It is an amenable number.

16027021 is a deficient number, since it is larger than the sum of its proper divisors (696851).

16027021 is an equidigital number, since it uses as much as digits as its factorization.

16027021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696850.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 16027021 is about 4003.3762001591. The cubic root of 16027021 is about 252.1259815616.

Adding to 16027021 its reverse (12072061), we get a palindrome (28099082).

The spelling of 16027021 in words is "sixteen million, twenty-seven thousand, twenty-one".