20329805056 has 36 divisors (see below), whose sum is σ = 44269311744. Its totient is φ = 9240819200.

The previous prime is 20329805051. The next prime is 20329805059. The reversal of 20329805056 is 65050892302.

It is a super-2 number, since 2×20329805056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20329805051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3606880 + ... + 3612511.

It is an arithmetic number, because the mean of its divisors is an integer number (1229703104).

Almost surely, 2^20329805056 is an apocalyptic number.

It is an amenable number.

20329805056 is an abundant number, since it is smaller than the sum of its proper divisors (23939506688).

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

20329805056 is an equidigital number, since it uses as much as digits as its factorization.

20329805056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7219418 (or 7219404 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 20329805056 in words is "twenty billion, three hundred twenty-nine million, eight hundred five thousand, fifty-six".