20004040404 has 36 divisors (see below), whose sum is σ = 50577374484. Its totient is φ = 6666483072.

The previous prime is 20004040373. The next prime is 20004040421. The reversal of 20004040404 is 40404040002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4263828804 + 15740211600 = 65298^2 + 125460^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

20004040404 is a modest number, since divided by 40404 gives 20004 as remainder.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 101104 + ... + 224120.

It is an arithmetic number, because the mean of its divisors is an integer number (1404927069).

Almost surely, 2^20004040404 is an apocalyptic number.

It is an amenable number.

20004040404 is an abundant number, since it is smaller than the sum of its proper divisors (30573334080).

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

20004040404 is a wasteful number, since it uses less digits than its factorization.

20004040404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127544 (or 127539 counting only the distinct ones).

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

Adding to 20004040404 its reverse (40404040002), we get a palindrome (60408080406).

It can be divided in two parts, 2000 and 4040404, that added together give a palindrome (4042404).

The spelling of 20004040404 in words is "twenty billion, four million, forty thousand, four hundred four".