20112220530 has 192 divisors, whose sum is σ = 54175080960. Its totient is φ = 5174926848.

The previous prime is 20112220523. The next prime is 20112220547. The reversal of 20112220530 is 3502221102.

20112220530 is a `hidden beast` number, since 2 + 0 + 112 + 2 + 20 + 530 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 102092392 + ... + 102092588.

It is an arithmetic number, because the mean of its divisors is an integer number (282161880).

Almost surely, 2^20112220530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112220530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27087540480).

20112220530 is an abundant number, since it is smaller than the sum of its proper divisors (34062860430).

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

20112220530 is a wasteful number, since it uses less digits than its factorization.

20112220530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 20112220530 its reverse (3502221102), we get a palindrome (23614441632).

The spelling of 20112220530 in words is "twenty billion, one hundred twelve million, two hundred twenty thousand, five hundred thirty".