20550025 has 12 divisors (see below), whose sum is σ = 26981532. Its totient is φ = 15472640.

The previous prime is 20550007. The next prime is 20550037. The reversal of 20550025 is 52005502.

It can be written as a sum of positive squares in 6 ways, for example, as 1505529 + 19044496 = 1227^2 + 4364^2 .

It is not a de Polignac number, because 20550025 - 2⁹ = 20549513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20549984 and 20550011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23752 + ... + 24601.

It is an arithmetic number, because the mean of its divisors is an integer number (2248461).

Almost surely, 2^20550025 is an apocalyptic number.

20550025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20550025 is a deficient number, since it is larger than the sum of its proper divisors (6431507).

20550025 is a wasteful number, since it uses less digits than its factorization.

20550025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48380 (or 48375 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 20550025 is about 4533.2135400839. The cubic root of 20550025 is about 273.9076224366.

Adding to 20550025 its reverse (52005502), we get a palindrome (72555527).

The spelling of 20550025 in words is "twenty million, five hundred fifty thousand, twenty-five".