12447673920 has 224 divisors, whose sum is σ = 47905050240. Its totient is φ = 3017594880.

The previous prime is 12447673871. The next prime is 12447673949. The reversal of 12447673920 is 2937674421.

12447673920 is a `hidden beast` number, since 1 + 24 + 476 + 73 + 92 + 0 = 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, 29554 + ... + 160526.

Almost surely, 2^12447673920 is an apocalyptic number.

12447673920 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 12447673920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23952525120).

12447673920 is an abundant number, since it is smaller than the sum of its proper divisors (35457376320).

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

12447673920 is a wasteful number, since it uses less digits than its factorization.

12447673920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131010 (or 130994 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 12447673920 in words is "twelve billion, four hundred forty-seven million, six hundred seventy-three thousand, nine hundred twenty".