20440040404 has 24 divisors (see below), whose sum is σ = 40902151808. Its totient is φ = 8755287840.

The previous prime is 20440040393. The next prime is 20440040459. The reversal of 20440040404 is 40404004402.

20440040404 is a modest number, since divided by 40404 gives 20440 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144024 + ... + 248239.

Almost surely, 2^20440040404 is an apocalyptic number.

It is an amenable number.

20440040404 is an abundant number, since it is smaller than the sum of its proper divisors (20462111404).

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

20440040404 is a wasteful number, since it uses less digits than its factorization.

20440040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394135 (or 394133 counting only the distinct ones).

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

Adding to 20440040404 its reverse (40404004402), we get a palindrome (60844044806).

The spelling of 20440040404 in words is "twenty billion, four hundred forty million, forty thousand, four hundred four".