20004430440 has 64 divisors (see below), whose sum is σ = 63171892800. Its totient is φ = 5053750272.

The previous prime is 20004430427. The next prime is 20004430441. The reversal of 20004430440 is 4403440002.

It is not an unprimeable number, because it can be changed into a prime (20004430441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4384657 + ... + 4389216.

It is an arithmetic number, because the mean of its divisors is an integer number (987060825).

Almost surely, 2^20004430440 is an apocalyptic number.

20004430440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004430440 is an abundant number, since it is smaller than the sum of its proper divisors (43167462360).

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

20004430440 is a wasteful number, since it uses less digits than its factorization.

20004430440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8773906 (or 8773902 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20004430440 its reverse (4403440002), we get a palindrome (24407870442).

The spelling of 20004430440 in words is "twenty billion, four million, four hundred thirty thousand, four hundred forty".