20422241 has 4 divisors (see below), whose sum is σ = 23339712. Its totient is φ = 17504772.

The previous prime is 20422189. The next prime is 20422243. The reversal of 20422241 is 14222402.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-20422241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20422243) 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, 1458725 + ... + 1458738.

It is an arithmetic number, because the mean of its divisors is an integer number (5834928).

Almost surely, 2^20422241 is an apocalyptic number.

It is an amenable number.

20422241 is a deficient number, since it is larger than the sum of its proper divisors (2917471).

20422241 is an equidigital number, since it uses as much as digits as its factorization.

20422241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917470.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20422241 is about 4519.0973656251. The cubic root of 20422241 is about 273.3387048650.

Adding to 20422241 its reverse (14222402), we get a palindrome (34644643).

The spelling of 20422241 in words is "twenty million, four hundred twenty-two thousand, two hundred forty-one".