20558031080808 has 512 divisors, whose sum is σ = 61379265024000. Its totient is φ = 5677145210880.

The previous prime is 20558031080801. The next prime is 20558031080849. The reversal of 20558031080808 is 80808013085502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20558031080801) 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, 13806601728 + ... + 13806603216.

It is an arithmetic number, because the mean of its divisors is an integer number (119881377000).

Almost surely, 2^{20558031080808} 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 20558031080808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30689632512000).

20558031080808 is an abundant number, since it is smaller than the sum of its proper divisors (40821233943192).

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

20558031080808 is a wasteful number, since it uses less digits than its factorization.

20558031080808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457 (or 2453 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 48.

The spelling of 20558031080808 in words is "twenty trillion, five hundred fifty-eight billion, thirty-one million, eighty thousand, eight hundred eight".