20005220505330 has 96 divisors (see below), whose sum is σ = 53949745047744. Its totient is φ = 5333761866816.

The previous prime is 20005220505329. The next prime is 20005220505383. The reversal of 20005220505330 is 3350502250002.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20005220505294 and 20005220505303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12762769 + ... + 14244251.

It is an arithmetic number, because the mean of its divisors is an integer number (561976510914).

Almost surely, 2^{20005220505330} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20005220505330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26974872523872).

20005220505330 is an abundant number, since it is smaller than the sum of its proper divisors (33944524542414).

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

20005220505330 is a wasteful number, since it uses less digits than its factorization.

20005220505330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487062 (or 1487050 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

Adding to 20005220505330 its reverse (3350502250002), we get a palindrome (23355722755332).

The spelling of 20005220505330 in words is "twenty trillion, five billion, two hundred twenty million, five hundred five thousand, three hundred thirty".