20403444002 has 8 divisors (see below), whose sum is σ = 30640880556. Its totient is φ = 10189817152.

The previous prime is 20403443981. The next prime is 20403444007. The reversal of 20403444002 is 20044430402.

It can be written as a sum of positive squares in 2 ways, for example, as 20394981721 + 8462281 = 142811^2 + 2909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20403444007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5950283 + ... + 5953710.

Almost surely, 2^20403444002 is an apocalyptic number.

20403444002 is a deficient number, since it is larger than the sum of its proper divisors (10237436554).

20403444002 is a wasteful number, since it uses less digits than its factorization.

20403444002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904852.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 20403444002 its reverse (20044430402), we get a palindrome (40447874404).

The spelling of 20403444002 in words is "twenty billion, four hundred three million, four hundred forty-four thousand, two".