20225625 has 80 divisors (see below), whose sum is σ = 40786944. Its totient is φ = 8712000.

The previous prime is 20225617. The next prime is 20225629. The reversal of 20225625 is 52652202.

It is not a de Polignac number, because 20225625 - 2³ = 20225617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20225595 and 20225604.

It is not an unprimeable number, because it can be changed into a prime (20225629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 301842 + ... + 301908.

Almost surely, 2^20225625 is an apocalyptic number.

20225625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20225625 is an abundant number, since it is smaller than the sum of its proper divisors (20561319).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20225625 is an equidigital number, since it uses as much as digits as its factorization.

20225625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20225625 is about 4497.2908511681. The cubic root of 20225625 is about 272.4586812756.

Adding to 20225625 its reverse (52652202), we get a palindrome (72877827).

The spelling of 20225625 in words is "twenty million, two hundred twenty-five thousand, six hundred twenty-five".