20550525 has 12 divisors (see below), whose sum is σ = 33976992. Its totient is φ = 10960240.

The previous prime is 20550521. The next prime is 20550529. The reversal of 20550525 is 52505502.

It is an interprime number because it is at equal distance from previous prime (20550521) and next prime (20550529).

It is not a de Polignac number, because 20550525 - 2² = 20550521 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20550495 and 20550504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20550521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136929 + ... + 137078.

It is an arithmetic number, because the mean of its divisors is an integer number (2831416).

Almost surely, 2^20550525 is an apocalyptic number.

20550525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20550525 is a deficient number, since it is larger than the sum of its proper divisors (13426467).

20550525 is a wasteful number, since it uses less digits than its factorization.

20550525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274020 (or 274015 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 20550525 is about 4533.2686882646. The cubic root of 20550525 is about 273.9098438889.

The spelling of 20550525 in words is "twenty million, five hundred fifty thousand, five hundred twenty-five".