12018474820 has 96 divisors (see below), whose sum is σ = 27841314816. Its totient is φ = 4321699200.

The previous prime is 12018474781. The next prime is 12018474829. The reversal of 12018474820 is 2847481021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12018474820.

It is not an unprimeable number, because it can be changed into a prime (12018474829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12376935 + ... + 12377905.

It is an arithmetic number, because the mean of its divisors is an integer number (290013696).

Almost surely, 2^12018474820 is an apocalyptic number.

12018474820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12018474820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13920657408).

12018474820 is an abundant number, since it is smaller than the sum of its proper divisors (15822839996).

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

12018474820 is a wasteful number, since it uses less digits than its factorization.

12018474820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The spelling of 12018474820 in words is "twelve billion, eighteen million, four hundred seventy-four thousand, eight hundred twenty".