12843827381 has 32 divisors (see below), whose sum is σ = 16454873088. Its totient is φ = 9734696640.

The previous prime is 12843827329. The next prime is 12843827383. The reversal of 12843827381 is 18372834821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12843827381 is a prime.

It is a super-2 number, since 2×12843827381² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12843827383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579011 + ... + 600783.

It is an arithmetic number, because the mean of its divisors is an integer number (514214784).

Almost surely, 2^12843827381 is an apocalyptic number.

12843827381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12843827381 is a deficient number, since it is larger than the sum of its proper divisors (3611045707).

12843827381 is a wasteful number, since it uses less digits than its factorization.

12843827381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22001.

The product of its digits is 516096, while the sum is 47.

The spelling of 12843827381 in words is "twelve billion, eight hundred forty-three million, eight hundred twenty-seven thousand, three hundred eighty-one".