20104440320 has 80 divisors (see below), whose sum is σ = 48511535688. Its totient is φ = 7990394880.

The previous prime is 20104440281. The next prime is 20104440401. The reversal of 20104440320 is 2304440102.

It can be written as a sum of positive squares in 4 ways, for example, as 15940577536 + 4163862784 = 126256^2 + 64528^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20104440292 and 20104440301.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 376910 + ... + 426930.

Almost surely, 2^20104440320 is an apocalyptic number.

20104440320 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 20104440320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24255767844).

20104440320 is an abundant number, since it is smaller than the sum of its proper divisors (28407095368).

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

20104440320 is an equidigital number, since it uses as much as digits as its factorization.

20104440320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50201 (or 50185 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20104440320 its reverse (2304440102), we get a palindrome (22408880422).

The spelling of 20104440320 in words is "twenty billion, one hundred four million, four hundred forty thousand, three hundred twenty".