11947909120 has 168 divisors, whose sum is σ = 33360178644. Its totient is φ = 4095737856.

The previous prime is 11947909081. The next prime is 11947909241. The reversal of 11947909120 is 2190974911.

It can be written as a sum of positive squares in 2 ways, for example, as 9980809216 + 1967099904 = 99904^2 + 44352^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2004064 + ... + 2010016.

Almost surely, 2^11947909120 is an apocalyptic number.

11947909120 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 11947909120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16680089322).

11947909120 is an abundant number, since it is smaller than the sum of its proper divisors (21412269524).

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

11947909120 is an frugal number, since it uses more digits than its factorization.

11947909120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998 (or 5967 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 11947909120 in words is "eleven billion, nine hundred forty-seven million, nine hundred nine thousand, one hundred twenty".