20530550 has 24 divisors (see below), whose sum is σ = 39506400. Its totient is φ = 7928480.

The previous prime is 20530541. The next prime is 20530553. The reversal of 20530550 is 5503502.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530553) 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 11 ways as a sum of consecutive naturals, for example, 5630 + ... + 8529.

It is an arithmetic number, because the mean of its divisors is an integer number (1646100).

Almost surely, 2^20530550 is an apocalyptic number.

20530550 is a deficient number, since it is larger than the sum of its proper divisors (18975850).

20530550 is a wasteful number, since it uses less digits than its factorization.

20530550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14200 (or 14195 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 20530550 is about 4531.0649962233. The cubic root of 20530550 is about 273.8210688204.

The spelling of 20530550 in words is "twenty million, five hundred thirty thousand, five hundred fifty".