20324225 has 6 divisors (see below), whose sum is σ = 25202070. Its totient is φ = 16259360.

The previous prime is 20324221. The next prime is 20324237. The reversal of 20324225 is 52242302.

It can be written as a sum of positive squares in 3 ways, for example, as 361201 + 19963024 = 601^2 + 4468^2 .

It is not a de Polignac number, because 20324225 - 2² = 20324221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20324197 and 20324206.

It is not an unprimeable number, because it can be changed into a prime (20324221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 406460 + ... + 406509.

It is an arithmetic number, because the mean of its divisors is an integer number (4200345).

Almost surely, 2^20324225 is an apocalyptic number.

20324225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20324225 is a deficient number, since it is larger than the sum of its proper divisors (4877845).

20324225 is an equidigital number, since it uses as much as digits as its factorization.

20324225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812979 (or 812974 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20324225 is about 4508.2396786329. The cubic root of 20324225 is about 272.9007094633.

Adding to 20324225 its reverse (52242302), we get a palindrome (72566527).

The spelling of 20324225 in words is "twenty million, three hundred twenty-four thousand, two hundred twenty-five".