22513256220 has 192 divisors, whose sum is σ = 80260024320. Its totient is φ = 4586222592.

The previous prime is 22513256219. The next prime is 22513256231. The reversal of 22513256220 is 2265231522.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87249 + ... + 229431.

It is an arithmetic number, because the mean of its divisors is an integer number (418020960).

Almost surely, 2^22513256220 is an apocalyptic number.

22513256220 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 22513256220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40130012160).

22513256220 is an abundant number, since it is smaller than the sum of its proper divisors (57746768100).

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

22513256220 is a wasteful number, since it uses less digits than its factorization.

22513256220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142244 (or 142242 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 22513256220 its reverse (2265231522), we get a palindrome (24778487742).

The spelling of 22513256220 in words is "twenty-two billion, five hundred thirteen million, two hundred fifty-six thousand, two hundred twenty".