12820751999 has 8 divisors (see below), whose sum is σ = 14722394880. Its totient is φ = 11041795800.

The previous prime is 12820751987. The next prime is 12820752001. The reversal of 12820751999 is 99915702821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12820751999 - 2²⁰ = 12819703423 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 12820751999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820721999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30671447 + ... + 30671864.

It is an arithmetic number, because the mean of its divisors is an integer number (1840299360).

Almost surely, 2^12820751999 is an apocalyptic number.

12820751999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12820751999 is a deficient number, since it is larger than the sum of its proper divisors (1901642881).

12820751999 is a wasteful number, since it uses less digits than its factorization.

12820751999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61343341.

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 12820751999 in words is "twelve billion, eight hundred twenty million, seven hundred fifty-one thousand, nine hundred ninety-nine".