20224235520 has 480 divisors, whose sum is σ = 74562087600. Its totient is φ = 5239406592.

The previous prime is 20224235519. The next prime is 20224235543. The reversal of 20224235520 is 2553242202.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30688951 + ... + 30689609.

Almost surely, 2^20224235520 is an apocalyptic number.

20224235520 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 20224235520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37281043800).

20224235520 is an abundant number, since it is smaller than the sum of its proper divisors (54337852080).

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

20224235520 is an equidigital number, since it uses as much as digits as its factorization.

20224235520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 706 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 20224235520 its reverse (2553242202), we get a palindrome (22777477722).

The spelling of 20224235520 in words is "twenty billion, two hundred twenty-four million, two hundred thirty-five thousand, five hundred twenty".