20440204442404 has 12 divisors (see below), whose sum is σ = 35771603331184. Its totient is φ = 10219746347784.

The previous prime is 20440204442393. The next prime is 20440204442423. The reversal of 20440204442404 is 40424440204402.

It is a self number, because there is not a number n which added to its sum of digits gives 20440204442404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88839102 + ... + 89068885.

Almost surely, 2^{20440204442404} is an apocalyptic number.

It is an amenable number.

20440204442404 is a deficient number, since it is larger than the sum of its proper divisors (15331398888780).

20440204442404 is a wasteful number, since it uses less digits than its factorization.

20440204442404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177936714 (or 177936712 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 34.

Adding to 20440204442404 its reverse (40424440204402), we get a palindrome (60864644646806).

The spelling of 20440204442404 in words is "twenty trillion, four hundred forty billion, two hundred four million, four hundred forty-two thousand, four hundred four".