20045512016 has 20 divisors (see below), whose sum is σ = 39222719124. Its totient is φ = 9923520000.

The previous prime is 20045512013. The next prime is 20045512027. The reversal of 20045512016 is 61021554002.

It can be written as a sum of positive squares in 2 ways, for example, as 17864995600 + 2180516416 = 133660^2 + 46696^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045512013) 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 3 ways as a sum of consecutive naturals, for example, 6200585 + ... + 6203816.

Almost surely, 2^20045512016 is an apocalyptic number.

It is an amenable number.

20045512016 is a deficient number, since it is larger than the sum of its proper divisors (19177207108).

20045512016 is a wasteful number, since it uses less digits than its factorization.

20045512016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12404510 (or 12404504 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 20045512016 in words is "twenty billion, forty-five million, five hundred twelve thousand, sixteen".