20422245 has 32 divisors (see below), whose sum is σ = 34721280. Its totient is φ = 10221120.

The previous prime is 20422243. The next prime is 20422247. The reversal of 20422245 is 54222402.

It is an interprime number because it is at equal distance from previous prime (20422243) and next prime (20422247).

It is not a de Polignac number, because 20422245 - 2¹ = 20422243 is a prime.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 37062 + ... + 37608.

It is an arithmetic number, because the mean of its divisors is an integer number (1085040).

Almost surely, 2^20422245 is an apocalyptic number.

It is an amenable number.

20422245 is a deficient number, since it is larger than the sum of its proper divisors (14299035).

20422245 is a wasteful number, since it uses less digits than its factorization.

20422245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 20422245 is about 4519.0978081914. The cubic root of 20422245 is about 273.3387227108.

Adding to 20422245 its reverse (54222402), we get a palindrome (74644647).

The spelling of 20422245 in words is "twenty million, four hundred twenty-two thousand, two hundred forty-five".