12695678920 has 32 divisors (see below), whose sum is σ = 29807248320. Its totient is φ = 4857476800.

The previous prime is 12695678873. The next prime is 12695678923. The reversal of 12695678920 is 2987659621.

It is a super-3 number, since 3×12695678920³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12695678923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6898906 + ... + 6900745.

It is an arithmetic number, because the mean of its divisors is an integer number (931476510).

Almost surely, 2^12695678920 is an apocalyptic number.

12695678920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12695678920 is an abundant number, since it is smaller than the sum of its proper divisors (17111569400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12695678920 is a wasteful number, since it uses less digits than its factorization.

12695678920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13799685 (or 13799681 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 12695678920 in words is "twelve billion, six hundred ninety-five million, six hundred seventy-eight thousand, nine hundred twenty".