12865914018 has 32 divisors (see below), whose sum is σ = 29834006400. Its totient is φ = 4102175088.

The previous prime is 12865914013. The next prime is 12865914023. The reversal of 12865914018 is 81041956821.

It is a happy number.

12865914018 is a `hidden beast` number, since 1 + 2 + 8 + 6 + 591 + 40 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (12865914013) and next prime (12865914023).

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 not an unprimeable number, because it can be changed into a prime (12865914013) 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 15 ways as a sum of consecutive naturals, for example, 5178273 + ... + 5180756.

It is an arithmetic number, because the mean of its divisors is an integer number (932312700).

Almost surely, 2^12865914018 is an apocalyptic number.

12865914018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12865914018 is an abundant number, since it is smaller than the sum of its proper divisors (16968092382).

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

12865914018 is a wasteful number, since it uses less digits than its factorization.

12865914018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10359063 (or 10359057 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 12865914018 in words is "twelve billion, eight hundred sixty-five million, nine hundred fourteen thousand, eighteen".