20120222232 has 256 divisors, whose sum is σ = 62072179200. Its totient is φ = 5988003840.

The previous prime is 20120222201. The next prime is 20120222261. The reversal of 20120222232 is 23222202102.

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

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, 36782583 + ... + 36783129.

It is an arithmetic number, because the mean of its divisors is an integer number (242469450).

Almost surely, 2^20120222232 is an apocalyptic number.

20120222232 is a gapful number since it is divisible by the number (22) 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 20120222232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31036089600).

20120222232 is an abundant number, since it is smaller than the sum of its proper divisors (41951956968).

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

20120222232 is a wasteful number, since it uses less digits than its factorization.

20120222232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20120222232 its reverse (23222202102), we get a palindrome (43342424334).

The spelling of 20120222232 in words is "twenty billion, one hundred twenty million, two hundred twenty-two thousand, two hundred thirty-two".