20413891404780 has 384 divisors, whose sum is σ = 62701638451200. Its totient is φ = 4946108783616.

The previous prime is 20413891404779. The next prime is 20413891404787. The reversal of 20413891404780 is 8740419831402.

It is not an unprimeable number, because it can be changed into a prime (20413891404787) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2303266629 + ... + 2303275491.

It is an arithmetic number, because the mean of its divisors is an integer number (163285516800).

Almost surely, 2^{20413891404780} is an apocalyptic number.

20413891404780 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 20413891404780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31350819225600).

20413891404780 is an abundant number, since it is smaller than the sum of its proper divisors (42287747046420).

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

20413891404780 is a wasteful number, since it uses less digits than its factorization.

20413891404780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9853 (or 9851 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 20413891404780 in words is "twenty trillion, four hundred thirteen billion, eight hundred ninety-one million, four hundred four thousand, seven hundred eighty".