20404404432 has 60 divisors (see below), whose sum is σ = 57114557604. Its totient is φ = 6800209920.

The previous prime is 20404404421. The next prime is 20404404457. The reversal of 20404404432 is 23440440402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15285860496 + 5118543936 = 123636^2 + 71544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20404404396 and 20404404405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1088128 + ... + 1106720.

Almost surely, 2^20404404432 is an apocalyptic number.

It is an amenable number.

20404404432 is an abundant number, since it is smaller than the sum of its proper divisors (36710153172).

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

20404404432 is a wasteful number, since it uses less digits than its factorization.

20404404432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26228 (or 26219 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 20404404432 its reverse (23440440402), we get a palindrome (43844844834).

The spelling of 20404404432 in words is "twenty billion, four hundred four million, four hundred four thousand, four hundred thirty-two".