20310330564564 has 96 divisors (see below), whose sum is σ = 50496405120000. Its totient is φ = 6335646045696.

The previous prime is 20310330564539. The next prime is 20310330564599. The reversal of 20310330564564 is 46546503301302.

It is a super-2 number, since 2×20310330564564² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4696492 + ... + 7916924.

It is an arithmetic number, because the mean of its divisors is an integer number (526004220000).

Almost surely, 2^{20310330564564} 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 20310330564564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25248202560000).

20310330564564 is an abundant number, since it is smaller than the sum of its proper divisors (30186074555436).

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

20310330564564 is a wasteful number, since it uses less digits than its factorization.

20310330564564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220797 (or 3220795 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

Adding to 20310330564564 its reverse (46546503301302), we get a palindrome (66856833865866).

The spelling of 20310330564564 in words is "twenty trillion, three hundred ten billion, three hundred thirty million, five hundred sixty-four thousand, five hundred sixty-four".