12327787818 has 16 divisors (see below), whose sum is σ = 27395084160. Its totient is φ = 4109262588.

The previous prime is 12327787789. The next prime is 12327787831. The reversal of 12327787818 is 81878772321.

It is a super-3 number, since 3×12327787818³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 228292367 = 12327787818 / (1 + 2 + 3 + 2 + 7 + 7 + 8 + 7 + 8 + 1 + 8).

It is an unprimeable number.

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, 114146130 + ... + 114146237.

It is an arithmetic number, because the mean of its divisors is an integer number (1712192760).

Almost surely, 2^12327787818 is an apocalyptic number.

12327787818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12327787818 is an abundant number, since it is smaller than the sum of its proper divisors (15067296342).

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

12327787818 is a wasteful number, since it uses less digits than its factorization.

12327787818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228292378 (or 228292372 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 54.

The spelling of 12327787818 in words is "twelve billion, three hundred twenty-seven million, seven hundred eighty-seven thousand, eight hundred eighteen".