13812171841 has 4 divisors (see below), whose sum is σ = 14874646612. Its totient is φ = 12749697072.

The previous prime is 13812171833. The next prime is 13812171871. The reversal of 13812171841 is 14817121831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14817121831 = 509 ⋅29110259.

It can be written as a sum of positive squares in 2 ways, for example, as 4034917441 + 9777254400 = 63521^2 + 98880^2 .

It is a cyclic number.

It is not a de Polignac number, because 13812171841 - 2³ = 13812171833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13812171841.

It is not an unprimeable number, because it can be changed into a prime (13812171811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531237366 + ... + 531237391.

It is an arithmetic number, because the mean of its divisors is an integer number (3718661653).

Almost surely, 2^13812171841 is an apocalyptic number.

It is an amenable number.

13812171841 is a deficient number, since it is larger than the sum of its proper divisors (1062474771).

13812171841 is a wasteful number, since it uses less digits than its factorization.

13812171841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062474770.

The product of its digits is 10752, while the sum is 37.

The spelling of 13812171841 in words is "thirteen billion, eight hundred twelve million, one hundred seventy-one thousand, eight hundred forty-one".