20225550 has 24 divisors (see below), whose sum is σ = 50159736. Its totient is φ = 5393440.

The previous prime is 20225539. The next prime is 20225561. The reversal of 20225550 is 5552202.

It is an interprime number because it is at equal distance from previous prime (20225539) and next prime (20225561).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67269 + ... + 67568.

It is an arithmetic number, because the mean of its divisors is an integer number (2089989).

Almost surely, 2^20225550 is an apocalyptic number.

20225550 is an abundant number, since it is smaller than the sum of its proper divisors (29934186).

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

20225550 is a wasteful number, since it uses less digits than its factorization.

20225550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134852 (or 134847 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 20225550 is about 4497.2825128070. The cubic root of 20225550 is about 272.4583445010.

Adding to 20225550 its reverse (5552202), we get a palindrome (25777752).

It can be divided in two parts, 202 and 25550, that added together give a palindrome (25752).

The spelling of 20225550 in words is "twenty million, two hundred twenty-five thousand, five hundred fifty".