20059340161 has 9 divisors (see below), whose sum is σ = 23335487811. Its totient is φ = 17192870352.

The previous prime is 20059340149. The next prime is 20059340209. The reversal of 20059340161 is 16104395002.

The square root of 20059340161 is 141631.

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., 10466313025 + 9593027136 = 102305^2 + 97944^2 .

It is not a de Polignac number, because 20059340161 - 2⁷ = 20059340033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20059340131) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 981301 + ... + 1001533.

It is an arithmetic number, because the mean of its divisors is an integer number (2592831979).

Almost surely, 2^20059340161 is an apocalyptic number.

20059340161 is the 141631-st square number.

20059340161 is the 70816-th centered octagonal number.

It is an amenable number.

20059340161 is a deficient number, since it is larger than the sum of its proper divisors (3276147650).

20059340161 is an frugal number, since it uses more digits than its factorization.

20059340161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40480 (or 20240 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 20059340161 in words is "twenty billion, fifty-nine million, three hundred forty thousand, one hundred sixty-one".