12237478920 has 128 divisors (see below), whose sum is σ = 40881369600. Its totient is φ = 3256146432.

The previous prime is 12237478909. The next prime is 12237478933. The reversal of 12237478920 is 2987473221.

12237478920 is a `hidden beast` number, since 122 + 37 + 478 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 487804 + ... + 512276.

It is an arithmetic number, because the mean of its divisors is an integer number (319385700).

Almost surely, 2^12237478920 is an apocalyptic number.

12237478920 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 12237478920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20440684800).

12237478920 is an abundant number, since it is smaller than the sum of its proper divisors (28643890680).

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

12237478920 is a wasteful number, since it uses less digits than its factorization.

12237478920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24956 (or 24946 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 12237478920 in words is "twelve billion, two hundred thirty-seven million, four hundred seventy-eight thousand, nine hundred twenty".