20550112 has 48 divisors (see below), whose sum is σ = 44755200. Its totient is φ = 9210240.

The previous prime is 20550073. The next prime is 20550121. The reversal of 20550112 is 21105502.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 27439 + ... + 28177.

It is an arithmetic number, because the mean of its divisors is an integer number (932400).

Almost surely, 2^20550112 is an apocalyptic number.

20550112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20550112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22377600).

20550112 is an abundant number, since it is smaller than the sum of its proper divisors (24205088).

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

20550112 is a wasteful number, since it uses less digits than its factorization.

20550112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 20550112 is about 4533.2231359155. The cubic root of 20550112 is about 273.9080089719.

Adding to 20550112 its reverse (21105502), we get a palindrome (41655614).

The spelling of 20550112 in words is "twenty million, five hundred fifty thousand, one hundred twelve".