20044400442 has 48 divisors (see below), whose sum is σ = 44083907616. Its totient is φ = 6071392800.

The previous prime is 20044400423. The next prime is 20044400449. The reversal of 20044400442 is 24400444002.

It is not an unprimeable number, because it can be changed into a prime (20044400449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2200317 + ... + 2209407.

It is an arithmetic number, because the mean of its divisors is an integer number (918414742).

Almost surely, 2^20044400442 is an apocalyptic number.

20044400442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20044400442 is an abundant number, since it is smaller than the sum of its proper divisors (24039507174).

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

20044400442 is a wasteful number, since it uses less digits than its factorization.

20044400442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12155 (or 12144 counting only the distinct ones).

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

Adding to 20044400442 its reverse (24400444002), we get a palindrome (44444844444).

The spelling of 20044400442 in words is "twenty billion, forty-four million, four hundred thousand, four hundred forty-two".