20444122140 has 192 divisors, whose sum is σ = 65556449280. Its totient is φ = 4715827200.

The previous prime is 20444122099. The next prime is 20444122163. The reversal of 20444122140 is 4122144402.

It is a self number, because there is not a number n which added to its sum of digits gives 20444122140.

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, 3165915 + ... + 3172365.

It is an arithmetic number, because the mean of its divisors is an integer number (341439840).

Almost surely, 2^20444122140 is an apocalyptic number.

20444122140 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 20444122140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32778224640).

20444122140 is an abundant number, since it is smaller than the sum of its proper divisors (45112327140).

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

20444122140 is a wasteful number, since it uses less digits than its factorization.

20444122140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732 (or 6730 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 20444122140 its reverse (4122144402), we get a palindrome (24566266542).

The spelling of 20444122140 in words is "twenty billion, four hundred forty-four million, one hundred twenty-two thousand, one hundred forty".