20020550 has 48 divisors (see below), whose sum is σ = 41180400. Its totient is φ = 7180800.

The previous prime is 20020541. The next prime is 20020571. The reversal of 20020550 is 5502002.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 48746 + ... + 49154.

It is an arithmetic number, because the mean of its divisors is an integer number (857925).

Almost surely, 2^20020550 is an apocalyptic number.

20020550 is an abundant number, since it is smaller than the sum of its proper divisors (21159850).

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

20020550 is a wasteful number, since it uses less digits than its factorization.

20020550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 20020550 is about 4474.4329249638. The cubic root of 20020550 is about 271.5346986392.

Adding to 20020550 its reverse (5502002), we get a palindrome (25522552).

The spelling of 20020550 in words is "twenty million, twenty thousand, five hundred fifty".