20378704516 has 27 divisors (see below), whose sum is σ = 35994031087. Its totient is φ = 10095562880.

The previous prime is 20378704477. The next prime is 20378704517. The reversal of 20378704516 is 61540787302.

The square root of 20378704516 is 142754.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 355322500 + 20023382016 = 18850^2 + 141504^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20378704517) 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 8 ways as a sum of consecutive naturals, for example, 39114336 + ... + 39114856.

Almost surely, 2^20378704516 is an apocalyptic number.

20378704516 is the 142754-th square number.

It is an amenable number.

20378704516 is a deficient number, since it is larger than the sum of its proper divisors (15615326571).

20378704516 is an frugal number, since it uses more digits than its factorization.

20378704516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 20378704516 in words is "twenty billion, three hundred seventy-eight million, seven hundred four thousand, five hundred sixteen".