22005022520 has 128 divisors (see below), whose sum is σ = 58062312000. Its totient is φ = 7431782400.

The previous prime is 22005022511. The next prime is 22005022541. The reversal of 22005022520 is 2522050022.

It is a happy number.

It is a super-2 number, since 2×22005022520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22005022492 and 22005022501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248120 + ... + 324920.

Almost surely, 2^22005022520 is an apocalyptic number.

22005022520 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 22005022520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29031156000).

22005022520 is an abundant number, since it is smaller than the sum of its proper divisors (36057289480).

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

22005022520 is a wasteful number, since it uses less digits than its factorization.

22005022520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76873 (or 76869 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

Adding to 22005022520 its reverse (2522050022), we get a palindrome (24527072542).

It can be divided in two parts, 2200502 and 2520, that added together give a palindrome (2203022).

The spelling of 22005022520 in words is "twenty-two billion, five million, twenty-two thousand, five hundred twenty".