20445244120500 has 192 divisors, whose sum is σ = 61285951254528. Its totient is φ = 5293382236800.

The previous prime is 20445244120489. The next prime is 20445244120529. The reversal of 20445244120500 is 502144254402.

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, 9822457 + ... + 11720543.

It is an arithmetic number, because the mean of its divisors is an integer number (319197662784).

Almost surely, 2^{20445244120500} is an apocalyptic number.

20445244120500 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 20445244120500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30642975627264).

20445244120500 is an abundant number, since it is smaller than the sum of its proper divisors (40840707134028).

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

20445244120500 is a wasteful number, since it uses less digits than its factorization.

20445244120500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898319 (or 1898307 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 33.

Adding to 20445244120500 its reverse (502144254402), we get a palindrome (20947388374902).

The spelling of 20445244120500 in words is "twenty trillion, four hundred forty-five billion, two hundred forty-four million, one hundred twenty thousand, five hundred".