20525222446120 has 128 divisors (see below), whose sum is σ = 53803517241600. Its totient is φ = 6900776902656.

The previous prime is 20525222446117. The next prime is 20525222446129. The reversal of 20525222446120 is 2164422252502.

It is a self number, because there is not a number n which added to its sum of digits gives 20525222446120.

It is not an unprimeable number, because it can be changed into a prime (20525222446129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27666667 + ... + 28398853.

It is an arithmetic number, because the mean of its divisors is an integer number (420339978450).

Almost surely, 2^{20525222446120} is an apocalyptic number.

20525222446120 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 20525222446120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26901758620800).

20525222446120 is an abundant number, since it is smaller than the sum of its proper divisors (33278294795480).

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

20525222446120 is a wasteful number, since it uses less digits than its factorization.

20525222446120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734147 (or 734143 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 20525222446120 its reverse (2164422252502), we get a palindrome (22689644698622).

The spelling of 20525222446120 in words is "twenty trillion, five hundred twenty-five billion, two hundred twenty-two million, four hundred forty-six thousand, one hundred twenty".