12821337837 has 48 divisors (see below), whose sum is σ = 23652720000. Its totient is φ = 6497971200.

The previous prime is 12821337773. The next prime is 12821337857. The reversal of 12821337837 is 73873312821.

It is a happy number.

12821337837 is a `hidden beast` number, since 1 + 282 + 1 + 337 + 8 + 37 = 666.

It is not a de Polignac number, because 12821337837 - 2⁶ = 12821337773 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12821337792 and 12821337801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821337857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197212 + ... + 254037.

It is an arithmetic number, because the mean of its divisors is an integer number (492765000).

Almost surely, 2^12821337837 is an apocalyptic number.

It is an amenable number.

12821337837 is a deficient number, since it is larger than the sum of its proper divisors (10831382163).

12821337837 is a wasteful number, since it uses less digits than its factorization.

12821337837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451314 (or 451311 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The spelling of 12821337837 in words is "twelve billion, eight hundred twenty-one million, three hundred thirty-seven thousand, eight hundred thirty-seven".