20671538176 has 33 divisors (see below), whose sum is σ = 41332088521. Its totient is φ = 10333468672.

The previous prime is 20671538123. The next prime is 20671538179. The reversal of 20671538176 is 67183517602.

The square root of 20671538176 is 143776.

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

It can be written as a sum of positive squares in only one way, i.e., 20597990400 + 73547776 = 143520^2 + 8576^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20671538179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4598586 + ... + 4603078.

Almost surely, 2^20671538176 is an apocalyptic number.

20671538176 is the 143776-th square number.

It is an amenable number.

20671538176 is a deficient number, since it is larger than the sum of its proper divisors (20660550345).

20671538176 is an frugal number, since it uses more digits than its factorization.

20671538176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9006 (or 4495 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 20671538176 in words is "twenty billion, six hundred seventy-one million, five hundred thirty-eight thousand, one hundred seventy-six".