16021983 has 4 divisors (see below), whose sum is σ = 21362648. Its totient is φ = 10681320.

The previous prime is 16021969. The next prime is 16021987. The reversal of 16021983 is 38912061.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 16021983 - 2⁶ = 16021919 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 16021983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16021987) 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 3 ways as a sum of consecutive naturals, for example, 2670328 + ... + 2670333.

It is an arithmetic number, because the mean of its divisors is an integer number (5340662).

Almost surely, 2^16021983 is an apocalyptic number.

16021983 is a deficient number, since it is larger than the sum of its proper divisors (5340665).

16021983 is an equidigital number, since it uses as much as digits as its factorization.

16021983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340664.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 16021983 is about 4002.7469317957. The cubic root of 16021983 is about 252.0995606854.

The spelling of 16021983 in words is "sixteen million, twenty-one thousand, nine hundred eighty-three".