22642843 has 4 divisors (see below), whose sum is σ = 23026680. Its totient is φ = 22259008.

The previous prime is 22642831. The next prime is 22642871. The reversal of 22642843 is 34824622.

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 22642843 - 2⁹ = 22642331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22642883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191830 + ... + 191947.

It is an arithmetic number, because the mean of its divisors is an integer number (5756670).

Almost surely, 2^22642843 is an apocalyptic number.

22642843 is a deficient number, since it is larger than the sum of its proper divisors (383837).

22642843 is an equidigital number, since it uses as much as digits as its factorization.

22642843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383836.

The product of its digits is 18432, while the sum is 31.

The square root of 22642843 is about 4758.4496424781. The cubic root of 22642843 is about 282.9069728823.

The spelling of 22642843 in words is "twenty-two million, six hundred forty-two thousand, eight hundred forty-three".