20224243 has 4 divisors (see below), whose sum is σ = 21779968. Its totient is φ = 18668520.

The previous prime is 20224229. The next prime is 20224247. The reversal of 20224243 is 34242202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34242202 = 2 ⋅17121101.

It is a de Polignac number, because none of the positive numbers 2^k-20224243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20224243.

It is not an unprimeable number, because it can be changed into a prime (20224247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777843 + ... + 777868.

It is an arithmetic number, because the mean of its divisors is an integer number (5444992).

Almost surely, 2^20224243 is an apocalyptic number.

20224243 is a deficient number, since it is larger than the sum of its proper divisors (1555725).

20224243 is a wasteful number, since it uses less digits than its factorization.

20224243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555724.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 20224243 is about 4497.1372004865. The cubic root of 20224243 is about 272.4524755098.

Adding to 20224243 its reverse (34242202), we get a palindrome (54466445).

The spelling of 20224243 in words is "twenty million, two hundred twenty-four thousand, two hundred forty-three".