20004444 has 36 divisors (see below), whose sum is σ = 53542944. Its totient is φ = 6275712.

The previous prime is 20004431. The next prime is 20004451. The reversal of 20004444 is 44440002.

It is a happy number.

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).

20004444 is a modest number, since divided by 4444 gives 2000 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 (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15732 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (1487304).

Almost surely, 2^20004444 is an apocalyptic number.

It is an amenable number.

20004444 is an abundant number, since it is smaller than the sum of its proper divisors (33538500).

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

20004444 is a wasteful number, since it uses less digits than its factorization.

20004444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32714 (or 32709 counting only the distinct ones).

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

The square root of 20004444 is about 4472.6327817070. The cubic root of 20004444 is about 271.4618649571.

Adding to 20004444 its reverse (44440002), we get a palindrome (64444446).

The spelling of 20004444 in words is "twenty million, four thousand, four hundred forty-four".