20404443312 has 120 divisors (see below), whose sum is σ = 62995767120. Its totient is φ = 6113648640.

The previous prime is 20404443287. The next prime is 20404443329. The reversal of 20404443312 is 21334440402.

It is a happy number.

20404443312 is a `hidden beast` number, since 204 + 0 + 4 + 443 + 3 + 12 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68608 + ... + 213344.

It is an arithmetic number, because the mean of its divisors is an integer number (524964726).

Almost surely, 2^20404443312 is an apocalyptic number.

20404443312 is a gapful number since it is divisible by the number (22) 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 20404443312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31497883560).

20404443312 is an abundant number, since it is smaller than the sum of its proper divisors (42591323808).

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

20404443312 is a wasteful number, since it uses less digits than its factorization.

20404443312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144851 (or 144842 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20404443312 its reverse (21334440402), we get a palindrome (41738883714).

The spelling of 20404443312 in words is "twenty billion, four hundred four million, four hundred forty-three thousand, three hundred twelve".