20440400404 has 6 divisors (see below), whose sum is σ = 35770700714. Its totient is φ = 10220200200.

The previous prime is 20440400377. The next prime is 20440400417. The reversal of 20440400404 is 40400404402.

It can be written as a sum of positive squares in only one way, i.e., 19600560004 + 839840400 = 140002^2 + 28980^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555050047 + ... + 2555050054.

Almost surely, 2^20440400404 is an apocalyptic number.

It is an amenable number.

20440400404 is a deficient number, since it is larger than the sum of its proper divisors (15330300310).

20440400404 is a wasteful number, since it uses less digits than its factorization.

20440400404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110100105 (or 5110100103 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20440400404 its reverse (40400404402), we get a palindrome (60840804806).

The spelling of 20440400404 in words is "twenty billion, four hundred forty million, four hundred thousand, four hundred four".