20120013223320 has 128 divisors (see below), whose sum is σ = 60931676908800. Its totient is φ = 5314537053696.

The previous prime is 20120013223291. The next prime is 20120013223333. The reversal of 20120013223320 is 2332231002102.

It is a happy number.

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, 108623746 + ... + 108808814.

It is an arithmetic number, because the mean of its divisors is an integer number (476028725850).

Almost surely, 2^{20120013223320} is an apocalyptic number.

20120013223320 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 20120013223320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30465838454400).

20120013223320 is an abundant number, since it is smaller than the sum of its proper divisors (40811663685480).

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

20120013223320 is a wasteful number, since it uses less digits than its factorization.

20120013223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193657 (or 193653 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20120013223320 its reverse (2332231002102), we get a palindrome (22452244225422).

The spelling of 20120013223320 in words is "twenty trillion, one hundred twenty billion, thirteen million, two hundred twenty-three thousand, three hundred twenty".