20109101827281 has 64 divisors (see below), whose sum is σ = 28563640934400. Its totient is φ = 12561968853504.

The previous prime is 20109101827267. The next prime is 20109101827319. The reversal of 20109101827281 is 18272810190102.

It is not a de Polignac number, because 20109101827281 - 2²⁵ = 20109068272849 is a prime.

It is a super-2 number, since 2×20109101827281² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20109101827211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 417497706 + ... + 417545868.

It is an arithmetic number, because the mean of its divisors is an integer number (446306889600).

Almost surely, 2^{20109101827281} is an apocalyptic number.

It is an amenable number.

20109101827281 is a deficient number, since it is larger than the sum of its proper divisors (8454539107119).

20109101827281 is a wasteful number, since it uses less digits than its factorization.

20109101827281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48950.

The product of its (nonzero) digits is 32256, while the sum is 42.

The spelling of 20109101827281 in words is "twenty trillion, one hundred nine billion, one hundred one million, eight hundred twenty-seven thousand, two hundred eighty-one".