12647688420 has 24 divisors (see below), whose sum is σ = 35413527744. Its totient is φ = 3372716896.

The previous prime is 12647688367. The next prime is 12647688421. The reversal of 12647688420 is 2488674621.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12647688420.

It is not an unprimeable number, because it can be changed into a prime (12647688421) 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, 105397344 + ... + 105397463.

It is an arithmetic number, because the mean of its divisors is an integer number (1475563656).

Almost surely, 2^12647688420 is an apocalyptic number.

12647688420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12647688420 is an abundant number, since it is smaller than the sum of its proper divisors (22765839324).

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

12647688420 is a wasteful number, since it uses less digits than its factorization.

12647688420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210794819 (or 210794817 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 12647688420 in words is "twelve billion, six hundred forty-seven million, six hundred eighty-eight thousand, four hundred twenty".