20744543121120 has 1296 divisors, whose sum is σ = 92708512146432. Its totient is φ = 4186473984000.

The previous prime is 20744543121059. The next prime is 20744543121161. The reversal of 20744543121120 is 2112134544702.

20744543121120 is a `hidden beast` number, since 2 + 0 + 7 + 4 + 4 + 5 + 431 + 211 + 2 + 0 = 666.

It is a super-2 number, since 2×20744543121120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 485219745 + ... + 485262495.

It is an arithmetic number, because the mean of its divisors is an integer number (71534345792).

Almost surely, 2^{20744543121120} is an apocalyptic number.

20744543121120 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 20744543121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46354256073216).

20744543121120 is an abundant number, since it is smaller than the sum of its proper divisors (71963969025312).

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

20744543121120 is a wasteful number, since it uses less digits than its factorization.

20744543121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42845 (or 42804 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

Adding to 20744543121120 its reverse (2112134544702), we get a palindrome (22856677665822).

The spelling of 20744543121120 in words is "twenty trillion, seven hundred forty-four billion, five hundred forty-three million, one hundred twenty-one thousand, one hundred twenty".