20550325 has 6 divisors (see below), whose sum is σ = 25482434. Its totient is φ = 16440240.

The previous prime is 20550319. The next prime is 20550329. The reversal of 20550325 is 52305502.

It can be written as a sum of positive squares in 3 ways, for example, as 1965604 + 18584721 = 1402^2 + 4311^2 .

It is not a de Polignac number, because 20550325 - 2⁹ = 20549813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20550296 and 20550305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550329) 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 5 ways as a sum of consecutive naturals, for example, 410982 + ... + 411031.

Almost surely, 2^20550325 is an apocalyptic number.

20550325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20550325 is a deficient number, since it is larger than the sum of its proper divisors (4932109).

20550325 is an equidigital number, since it uses as much as digits as its factorization.

20550325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822023 (or 822018 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20550325 is about 4533.2466290728. The cubic root of 20550325 is about 273.9089553123.

Adding to 20550325 its reverse (52305502), we get a palindrome (72855827).

The spelling of 20550325 in words is "twenty million, five hundred fifty thousand, three hundred twenty-five".