12318787850 has 24 divisors (see below), whose sum is σ = 22920110400. Its totient is φ = 4925974320.

The previous prime is 12318787849. The next prime is 12318787853. The reversal of 12318787850 is 5878781321.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (12318787853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130301 + ... + 203999.

It is an arithmetic number, because the mean of its divisors is an integer number (955004600).

Almost surely, 2^12318787850 is an apocalyptic number.

12318787850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12318787850 is a deficient number, since it is larger than the sum of its proper divisors (10601322550).

12318787850 is a wasteful number, since it uses less digits than its factorization.

12318787850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77054 (or 77049 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 50.

The spelling of 12318787850 in words is "twelve billion, three hundred eighteen million, seven hundred eighty-seven thousand, eight hundred fifty".