20752224220 has 144 divisors (see below), whose sum is σ = 54836466048. Its totient is φ = 6538613760.

The previous prime is 20752224209. The next prime is 20752224271. The reversal of 20752224220 is 2242225702.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2964925 + ... + 2971915.

It is an arithmetic number, because the mean of its divisors is an integer number (380808792).

Almost surely, 2^20752224220 is an apocalyptic number.

20752224220 is a gapful number since it is divisible by the number (20) 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 20752224220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27418233024).

20752224220 is an abundant number, since it is smaller than the sum of its proper divisors (34084241828).

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

20752224220 is a wasteful number, since it uses less digits than its factorization.

20752224220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7260 (or 7251 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

Adding to 20752224220 its reverse (2242225702), we get a palindrome (22994449922).

The spelling of 20752224220 in words is "twenty billion, seven hundred fifty-two million, two hundred twenty-four thousand, two hundred twenty".