20004040044 has 24 divisors (see below), whose sum is σ = 51862326320. Its totient is φ = 6668013312.

The previous prime is 20004040013. The next prime is 20004040051. The reversal of 20004040044 is 44004040002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20004039999 and 20004040026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92611189 + ... + 92611404.

Almost surely, 2^20004040044 is an apocalyptic number.

It is an amenable number.

20004040044 is an abundant number, since it is smaller than the sum of its proper divisors (31858286276).

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

20004040044 is a wasteful number, since it uses less digits than its factorization.

20004040044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185222606 (or 185222598 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20004040044 its reverse (44004040002), we get a palindrome (64008080046).

The spelling of 20004040044 in words is "twenty billion, four million, forty thousand, forty-four".