20059927126561 has 9 divisors (see below), whose sum is σ = 23335053740211. Its totient is φ = 17194196378352.

The previous prime is 20059927126529. The next prime is 20059927126597. The reversal of 20059927126561 is 16562172995002.

The square root of 20059927126561 is 4478831.

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., 19484234669025 + 575692457536 = 4414095^2 + 758744^2 .

It is not a de Polignac number, because 20059927126561 - 2⁵ = 20059927126529 is a prime.

It is a super-2 number, since 2×20059927126561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20059927126501) 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, 31031901 + ... + 31671733.

Almost surely, 2^{20059927126561} is an apocalyptic number.

20059927126561 is the 4478831-st square number.

20059927126561 is the 2239416-th centered octagonal number.

It is an amenable number.

20059927126561 is a deficient number, since it is larger than the sum of its proper divisors (3275126613650).

20059927126561 is an frugal number, since it uses more digits than its factorization.

20059927126561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279680 (or 639840 counting only the distinct ones).

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

The spelling of 20059927126561 in words is "twenty trillion, fifty-nine billion, nine hundred twenty-seven million, one hundred twenty-six thousand, five hundred sixty-one".