20104442320 has 20 divisors (see below), whose sum is σ = 46742828580. Its totient is φ = 8041776896.

The previous prime is 20104442273. The next prime is 20104442321. The reversal of 20104442320 is 2324440102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8020277136 + 12084165184 = 89556^2 + 109928^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 20104442291 and 20104442300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104442321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125652685 + ... + 125652844.

It is an arithmetic number, because the mean of its divisors is an integer number (2337141429).

Almost surely, 2^20104442320 is an apocalyptic number.

20104442320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20104442320 is an abundant number, since it is smaller than the sum of its proper divisors (26638386260).

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

20104442320 is a wasteful number, since it uses less digits than its factorization.

20104442320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251305542 (or 251305536 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20104442320 its reverse (2324440102), we get a palindrome (22428882422).

The spelling of 20104442320 in words is "twenty billion, one hundred four million, four hundred forty-two thousand, three hundred twenty".