13843150821 has 6 divisors (see below), whose sum is σ = 19995662310. Its totient is φ = 9228767208.

The previous prime is 13843150801. The next prime is 13843150823. The reversal of 13843150821 is 12805134831.

It can be written as a sum of positive squares in only one way, i.e., 8899092225 + 4944058596 = 94335^2 + 70314^2 .

It is not a de Polignac number, because 13843150821 - 2⁶ = 13843150757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13843150823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 769063926 + ... + 769063943.

It is an arithmetic number, because the mean of its divisors is an integer number (3332610385).

Almost surely, 2^13843150821 is an apocalyptic number.

It is an amenable number.

13843150821 is a deficient number, since it is larger than the sum of its proper divisors (6152511489).

13843150821 is a wasteful number, since it uses less digits than its factorization.

13843150821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538127875 (or 1538127872 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 13843150821 in words is "thirteen billion, eight hundred forty-three million, one hundred fifty thousand, eight hundred twenty-one".