20442442422140 has 96 divisors (see below), whose sum is σ = 44626017744000. Its totient is φ = 7856557793280.

The previous prime is 20442442422013. The next prime is 20442442422163. The reversal of 20442442422140 is 4122424424402.

It is a self number, because there is not a number n which added to its sum of digits gives 20442442422140.

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, 195499952 + ... + 195604488.

It is an arithmetic number, because the mean of its divisors is an integer number (464854351500).

Almost surely, 2^{20442442422140} is an apocalyptic number.

20442442422140 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 20442442422140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22313008872000).

20442442422140 is an abundant number, since it is smaller than the sum of its proper divisors (24183575321860).

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

20442442422140 is a wasteful number, since it uses less digits than its factorization.

20442442422140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106215 (or 106213 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 35.

Adding to 20442442422140 its reverse (4122424424402), we get a palindrome (24564866846542).

The spelling of 20442442422140 in words is "twenty trillion, four hundred forty-two billion, four hundred forty-two million, four hundred twenty-two thousand, one hundred forty".