20224213 has 4 divisors (see below), whose sum is σ = 20252320. Its totient is φ = 20196108.

The previous prime is 20224207. The next prime is 20224229. The reversal of 20224213 is 31242202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20224213 - 2²¹ = 18127061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20224273) 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, 12945 + ... + 14422.

It is an arithmetic number, because the mean of its divisors is an integer number (5063080).

Almost surely, 2^20224213 is an apocalyptic number.

It is an amenable number.

20224213 is a deficient number, since it is larger than the sum of its proper divisors (28107).

20224213 is an equidigital number, since it uses as much as digits as its factorization.

20224213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28106.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20224213 is about 4497.1338650300. The cubic root of 20224213 is about 272.4523407939.

Adding to 20224213 its reverse (31242202), we get a palindrome (51466415).

The spelling of 20224213 in words is "twenty million, two hundred twenty-four thousand, two hundred thirteen".