20244512045520 has 240 divisors, whose sum is σ = 77705945965440. Its totient is φ = 4626984692736.

The previous prime is 20244512045503. The next prime is 20244512045521. The reversal of 20244512045520 is 2554021544202.

20244512045520 is a `hidden beast` number, since 2 + 0 + 2 + 4 + 4 + 5 + 120 + 4 + 5 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×20244512045520² (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 not an unprimeable number, because it can be changed into a prime (20244512045521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73794847 + ... + 74068673.

It is an arithmetic number, because the mean of its divisors is an integer number (323774774856).

Almost surely, 2^{20244512045520} is an apocalyptic number.

20244512045520 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 20244512045520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38852972982720).

20244512045520 is an abundant number, since it is smaller than the sum of its proper divisors (57461433919920).

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

20244512045520 is a wasteful number, since it uses less digits than its factorization.

20244512045520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288522 (or 288513 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 20244512045520 its reverse (2554021544202), we get a palindrome (22798533589722).

The spelling of 20244512045520 in words is "twenty trillion, two hundred forty-four billion, five hundred twelve million, forty-five thousand, five hundred twenty".