16021343 has 4 divisors (see below), whose sum is σ = 17253768. Its totient is φ = 14788920.

The previous prime is 16021339. The next prime is 16021367. The reversal of 16021343 is 34312061.

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

It is a cyclic number.

It is not a de Polignac number, because 16021343 - 2² = 16021339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16021043) 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, 616193 + ... + 616218.

It is an arithmetic number, because the mean of its divisors is an integer number (4313442).

Almost surely, 2^16021343 is an apocalyptic number.

16021343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16021343 is a deficient number, since it is larger than the sum of its proper divisors (1232425).

16021343 is a wasteful number, since it uses less digits than its factorization.

16021343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232424.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 16021343 is about 4002.6669858983. Note that the first 3 decimals coincide. The cubic root of 16021343 is about 252.0962039251.

The spelling of 16021343 in words is "sixteen million, twenty-one thousand, three hundred forty-three".