12918947900 has 36 divisors (see below), whose sum is σ = 28094248728. Its totient is φ = 5156495040.

The previous prime is 12918947893. The next prime is 12918947903. The reversal of 12918947900 is 974981921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918947903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91619 + ... + 185018.

It is an arithmetic number, because the mean of its divisors is an integer number (780395798).

Almost surely, 2^12918947900 is an apocalyptic number.

12918947900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12918947900 is an abundant number, since it is smaller than the sum of its proper divisors (15175300828).

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

12918947900 is a wasteful number, since it uses less digits than its factorization.

12918947900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277118 (or 277111 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 12918947900 in words is "twelve billion, nine hundred eighteen million, nine hundred forty-seven thousand, nine hundred".