22220497530 has 640 divisors, whose sum is σ = 83099934720. Its totient is φ = 4113192960.

The previous prime is 22220497489. The next prime is 22220497543. The reversal of 22220497530 is 3579402222.

It is a super-2 number, since 2×22220497530² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 20144959 + ... + 20146061.

It is an arithmetic number, because the mean of its divisors is an integer number (129843648).

Almost surely, 2^22220497530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22220497530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41549967360).

22220497530 is an abundant number, since it is smaller than the sum of its proper divisors (60879437190).

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

22220497530 is a wasteful number, since it uses less digits than its factorization.

22220497530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

Adding to 22220497530 its reverse (3579402222), we get a palindrome (25799899752).

The spelling of 22220497530 in words is "twenty-two billion, two hundred twenty million, four hundred ninety-seven thousand, five hundred thirty".