22709843 has 4 divisors (see below), whose sum is σ = 24456768. Its totient is φ = 20962920.

The previous prime is 22709839. The next prime is 22709849. The reversal of 22709843 is 34890722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34890722 = 2 ⋅17445361.

It is a cyclic number.

It is not a de Polignac number, because 22709843 - 2² = 22709839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22709849) 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, 873443 + ... + 873468.

It is an arithmetic number, because the mean of its divisors is an integer number (6114192).

Almost surely, 2^22709843 is an apocalyptic number.

22709843 is a deficient number, since it is larger than the sum of its proper divisors (1746925).

22709843 is a wasteful number, since it uses less digits than its factorization.

22709843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746924.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 22709843 is about 4765.4845503894. The cubic root of 22709843 is about 283.1857379677.

The spelling of 22709843 in words is "twenty-two million, seven hundred nine thousand, eight hundred forty-three".