20004440223 has 16 divisors (see below), whose sum is σ = 27172559456. Its totient is φ = 13087319040.

The previous prime is 20004440221. The next prime is 20004440297. The reversal of 20004440223 is 32204440002.

It is not a de Polignac number, because 20004440223 - 2¹ = 20004440221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20004440223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004440221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46990 + ... + 205467.

It is an arithmetic number, because the mean of its divisors is an integer number (1698284966).

Almost surely, 2^20004440223 is an apocalyptic number.

20004440223 is a deficient number, since it is larger than the sum of its proper divisors (7168119233).

20004440223 is a wasteful number, since it uses less digits than its factorization.

20004440223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252954.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20004440223 its reverse (32204440002), we get a palindrome (52208880225).

The spelling of 20004440223 in words is "twenty billion, four million, four hundred forty thousand, two hundred twenty-three".