20004442440 has 64 divisors (see below), whose sum is σ = 62082763200. Its totient is φ = 5150568192.

The previous prime is 20004442439. The next prime is 20004442511. The reversal of 20004442440 is 4424440002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20004442440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2870722 + ... + 2877681.

It is an arithmetic number, because the mean of its divisors is an integer number (970043175).

Almost surely, 2^20004442440 is an apocalyptic number.

20004442440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004442440 is an abundant number, since it is smaller than the sum of its proper divisors (42078320760).

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

20004442440 is a wasteful number, since it uses less digits than its factorization.

20004442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5748446 (or 5748442 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20004442440 its reverse (4424440002), we get a palindrome (24428882442).

The spelling of 20004442440 in words is "twenty billion, four million, four hundred forty-two thousand, four hundred forty".