16422643 has 4 divisors (see below), whose sum is σ = 16431448. Its totient is φ = 16413840.

The previous prime is 16422641. The next prime is 16422647. The reversal of 16422643 is 34622461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34622461 = 79 ⋅438259.

It is a cyclic number.

It is not a de Polignac number, because 16422643 - 2¹ = 16422641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16422641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378 + ... + 5743.

It is an arithmetic number, because the mean of its divisors is an integer number (4107862).

Almost surely, 2^16422643 is an apocalyptic number.

16422643 is a deficient number, since it is larger than the sum of its proper divisors (8805).

16422643 is an equidigital number, since it uses as much as digits as its factorization.

16422643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8804.

The product of its digits is 6912, while the sum is 28.

The square root of 16422643 is about 4052.4860271196. The cubic root of 16422643 is about 254.1836923230.

The spelling of 16422643 in words is "sixteen million, four hundred twenty-two thousand, six hundred forty-three".