20111222530 has 64 divisors (see below), whose sum is σ = 43828957440. Its totient is φ = 6486165504.

The previous prime is 20111222501. The next prime is 20111222533. The reversal of 20111222530 is 3522211102.

It is a super-2 number, since 2×20111222530² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20111222498 and 20111222507.

It is not an unprimeable number, because it can be changed into a prime (20111222533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3065734 + ... + 3072286.

It is an arithmetic number, because the mean of its divisors is an integer number (684827460).

Almost surely, 2^20111222530 is an apocalyptic number.

20111222530 is an abundant number, since it is smaller than the sum of its proper divisors (23717734910).

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

20111222530 is a wasteful number, since it uses less digits than its factorization.

20111222530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9163.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20111222530 its reverse (3522211102), we get a palindrome (23633433632).

The spelling of 20111222530 in words is "twenty billion, one hundred eleven million, two hundred twenty-two thousand, five hundred thirty".