20599138576 has 45 divisors (see below), whose sum is σ = 40738248271. Its totient is φ = 10090311296.

The previous prime is 20599138489. The next prime is 20599138577. The reversal of 20599138576 is 67583199502.

The square root of 20599138576 is 143524.

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 13380936976 + 7218201600 = 115676^2 + 84960^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20599138577) 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, 30426750 + ... + 30427426.

Almost surely, 2^20599138576 is an apocalyptic number.

20599138576 is the 143524-th square number.

It is an amenable number.

20599138576 is a deficient number, since it is larger than the sum of its proper divisors (20139109695).

20599138576 is an frugal number, since it uses more digits than its factorization.

20599138576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 20599138576 in words is "twenty billion, five hundred ninety-nine million, one hundred thirty-eight thousand, five hundred seventy-six".