20326686720 has 224 divisors, whose sum is σ = 65858087232. Its totient is φ = 5352456192.

The previous prime is 20326686713. The next prime is 20326686739. The reversal of 20326686720 is 2768662302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10198044 + ... + 10200036.

It is an arithmetic number, because the mean of its divisors is an integer number (294009318).

Almost surely, 2^20326686720 is an apocalyptic number.

20326686720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20326686720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32929043616).

20326686720 is an abundant number, since it is smaller than the sum of its proper divisors (45531400512).

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

20326686720 is an equidigital number, since it uses as much as digits as its factorization.

20326686720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 20326686720 in words is "twenty billion, three hundred twenty-six million, six hundred eighty-six thousand, seven hundred twenty".