20142071875081 has 12 divisors (see below), whose sum is σ = 22562737119180. Its totient is φ = 17951554770240.

The previous prime is 20142071875063. The next prime is 20142071875157. The reversal of 20142071875081 is 18057817024102.

It can be written as a sum of positive squares in 6 ways, for example, as 3430981948681 + 16711089926400 = 1852291^2 + 4087920^2 .

It is not a de Polignac number, because 20142071875081 - 2¹⁷ = 20142071744009 is a prime.

It is a super-2 number, since 2×20142071875081² (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 (20142071875061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2054889190 + ... + 2054898991.

It is an arithmetic number, because the mean of its divisors is an integer number (1880228093265).

Almost surely, 2^{20142071875081} is an apocalyptic number.

It is an amenable number.

20142071875081 is a deficient number, since it is larger than the sum of its proper divisors (2420665244099).

20142071875081 is a wasteful number, since it uses less digits than its factorization.

20142071875081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4109788236 (or 4109788223 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 46.

Adding to 20142071875081 its reverse (18057817024102), we get a palindrome (38199888899183).

The spelling of 20142071875081 in words is "twenty trillion, one hundred forty-two billion, seventy-one million, eight hundred seventy-five thousand, eighty-one".