20323506732064 has 96 divisors (see below), whose sum is σ = 42227930525760. Its totient is φ = 9601761254400.

The previous prime is 20323506732041. The next prime is 20323506732079. The reversal of 20323506732064 is 46023760532302.

It is a self number, because there is not a number n which added to its sum of digits gives 20323506732064.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592370547 + ... + 1592383309.

It is an arithmetic number, because the mean of its divisors is an integer number (439874276310).

Almost surely, 2^{20323506732064} 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 20323506732064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21113965262880).

20323506732064 is an abundant number, since it is smaller than the sum of its proper divisors (21904423793696).

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

20323506732064 is a wasteful number, since it uses less digits than its factorization.

20323506732064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19434 (or 19426 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 43.

The spelling of 20323506732064 in words is "twenty trillion, three hundred twenty-three billion, five hundred six million, seven hundred thirty-two thousand, sixty-four".