12209743980 has 168 divisors, whose sum is σ = 43935347232. Its totient is φ = 2790775296.

The previous prime is 12209743939. The next prime is 12209743981. The reversal of 12209743980 is 8934790221.

12209743980 is a `hidden beast` number, since 1 + 2 + 209 + 7 + 439 + 8 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (12209743981) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 42244 + ... + 161876.

It is an arithmetic number, because the mean of its divisors is an integer number (261519924).

Almost surely, 2^12209743980 is an apocalyptic number.

12209743980 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 12209743980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21967673616).

12209743980 is an abundant number, since it is smaller than the sum of its proper divisors (31725603252).

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

12209743980 is a wasteful number, since it uses less digits than its factorization.

12209743980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119667 (or 119650 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 12209743980 in words is "twelve billion, two hundred nine million, seven hundred forty-three thousand, nine hundred eighty".