20044404 has 18 divisors (see below), whose sum is σ = 50667890. Its totient is φ = 6681456.

The previous prime is 20044397. The next prime is 20044447. The reversal of 20044404 is 40444002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 63504 = 4470^2 + 252^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 278359 + ... + 278430.

Almost surely, 2^20044404 is an apocalyptic number.

It is an amenable number.

20044404 is an abundant number, since it is smaller than the sum of its proper divisors (30623486).

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

20044404 is a wasteful number, since it uses less digits than its factorization.

20044404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556799 (or 556794 counting only the distinct ones).

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

The square root of 20044404 is about 4477.0977206221. The cubic root of 20044404 is about 271.6424981740.

Adding to 20044404 its reverse (40444002), we get a palindrome (60488406).

The spelling of 20044404 in words is "twenty million, forty-four thousand, four hundred four".