20004881039136 has 384 divisors, whose sum is σ = 70548952320000. Its totient is φ = 5387362348032.

The previous prime is 20004881039113. The next prime is 20004881039141. The reversal of 20004881039136 is 63193018840002.

20004881039136 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 488 + 1 + 0 + 39 + 136 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20004881039091 and 20004881039100.

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, 22195815 + ... + 23079513.

It is an arithmetic number, because the mean of its divisors is an integer number (183721230000).

Almost surely, 2^{20004881039136} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20004881039136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35274476160000).

20004881039136 is an abundant number, since it is smaller than the sum of its proper divisors (50544071280864).

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

20004881039136 is a wasteful number, since it uses less digits than its factorization.

20004881039136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883941 (or 883927 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

Adding to 20004881039136 its reverse (63193018840002), we get a palindrome (83197899879138).

The spelling of 20004881039136 in words is "twenty trillion, four billion, eight hundred eighty-one million, thirty-nine thousand, one hundred thirty-six".