20225245 has 4 divisors (see below), whose sum is σ = 24270300. Its totient is φ = 16180192.

The previous prime is 20225243. The next prime is 20225251. The reversal of 20225245 is 54252202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4519876 + 15705369 = 2126^2 + 3963^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225245 - 2¹ = 20225243 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20225243) 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, 2022520 + ... + 2022529.

It is an arithmetic number, because the mean of its divisors is an integer number (6067575).

Almost surely, 2^20225245 is an apocalyptic number.

It is an amenable number.

20225245 is a deficient number, since it is larger than the sum of its proper divisors (4045055).

20225245 is an equidigital number, since it uses as much as digits as its factorization.

20225245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4045054.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20225245 is about 4497.2486033129. The cubic root of 20225245 is about 272.4569749427.

Adding to 20225245 its reverse (54252202), we get a palindrome (74477447).

The spelling of 20225245 in words is "twenty million, two hundred twenty-five thousand, two hundred forty-five".