20504500120000 has 1120 divisors, whose sum is σ = 58068672076800. Its totient is φ = 7131027456000.

The previous prime is 20504500119989. The next prime is 20504500120007. The reversal of 20504500120000 is 2100540502.

It is a self number, because there is not a number n which added to its sum of digits gives 20504500120000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20504500120007) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 114550279911 + ... + 114550280089.

It is an arithmetic number, because the mean of its divisors is an integer number (51847028640).

Almost surely, 2^{20504500120000} is an apocalyptic number.

20504500120000 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 20504500120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29034336038400).

20504500120000 is an abundant number, since it is smaller than the sum of its proper divisors (37564171956800).

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

20504500120000 is a wasteful number, since it uses less digits than its factorization.

20504500120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 20504500120000 its reverse (2100540502), we get a palindrome (20506600660502).

The spelling of 20504500120000 in words is "twenty trillion, five hundred four billion, five hundred million, one hundred twenty thousand".