12821720037 has 16 divisors (see below), whose sum is σ = 19710764160. Its totient is φ = 7261857792.

The previous prime is 12821720029. The next prime is 12821720081. The reversal of 12821720037 is 73002712821.

It is not a de Polignac number, because 12821720037 - 2³ = 12821720029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12821720027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2699212 + ... + 2703957.

It is an arithmetic number, because the mean of its divisors is an integer number (1231922760).

Almost surely, 2^12821720037 is an apocalyptic number.

It is an amenable number.

12821720037 is a deficient number, since it is larger than the sum of its proper divisors (6889044123).

12821720037 is a wasteful number, since it uses less digits than its factorization.

12821720037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5403292.

The product of its (nonzero) digits is 9408, while the sum is 33.

The spelling of 12821720037 in words is "twelve billion, eight hundred twenty-one million, seven hundred twenty thousand, thirty-seven".