22001843 has 4 divisors (see below), whose sum is σ = 22169928. Its totient is φ = 21833760.

The previous prime is 22001821. The next prime is 22001851. The reversal of 22001843 is 34810022.

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 22001843 - 2¹⁰ = 22000819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001803) 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, 83846 + ... + 84107.

It is an arithmetic number, because the mean of its divisors is an integer number (5542482).

Almost surely, 2^22001843 is an apocalyptic number.

22001843 is a deficient number, since it is larger than the sum of its proper divisors (168085).

22001843 is a wasteful number, since it uses less digits than its factorization.

22001843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168084.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22001843 is about 4690.6122201691. The cubic root of 22001843 is about 280.2117573296.

Adding to 22001843 its reverse (34810022), we get a palindrome (56811865).

The spelling of 22001843 in words is "twenty-two million, one thousand, eight hundred forty-three".