20003445512 has 8 divisors (see below), whose sum is σ = 37506460350. Its totient is φ = 10001722752.

The previous prime is 20003445503. The next prime is 20003445577. The reversal of 20003445512 is 21554430002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19922193316 + 81252196 = 141146^2 + 9014^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1250215337 + ... + 1250215352.

Almost surely, 2^20003445512 is an apocalyptic number.

It is an amenable number.

20003445512 is a deficient number, since it is larger than the sum of its proper divisors (17503014838).

20003445512 is a wasteful number, since it uses less digits than its factorization.

20003445512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500430695 (or 2500430691 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20003445512 its reverse (21554430002), we get a palindrome (41557875514).

The spelling of 20003445512 in words is "twenty billion, three million, four hundred forty-five thousand, five hundred twelve".