20504224452 has 96 divisors (see below), whose sum is σ = 51378163200. Its totient is φ = 6344980992.

The previous prime is 20504224421. The next prime is 20504224453. The reversal of 20504224452 is 25442240502.

It is not an unprimeable number, because it can be changed into a prime (20504224453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4531063 + ... + 4535585.

It is an arithmetic number, because the mean of its divisors is an integer number (535189200).

Almost surely, 2^20504224452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20504224452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25689081600).

20504224452 is an abundant number, since it is smaller than the sum of its proper divisors (30873938748).

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

20504224452 is a wasteful number, since it uses less digits than its factorization.

20504224452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945 (or 4943 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

Adding to 20504224452 its reverse (25442240502), we get a palindrome (45946464954).

The spelling of 20504224452 in words is "twenty billion, five hundred four million, two hundred twenty-four thousand, four hundred fifty-two".