12115066820 has 48 divisors (see below), whose sum is σ = 26051699520. Its totient is φ = 4729984896.

The previous prime is 12115066807. The next prime is 12115066823. The reversal of 12115066820 is 2866051121.

It is not an unprimeable number, because it can be changed into a prime (12115066823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1465619 + ... + 1473861.

It is an arithmetic number, because the mean of its divisors is an integer number (542743740).

Almost surely, 2^12115066820 is an apocalyptic number.

12115066820 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 12115066820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13025849760).

12115066820 is an abundant number, since it is smaller than the sum of its proper divisors (13936632700).

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

12115066820 is a wasteful number, since it uses less digits than its factorization.

12115066820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10004 (or 10002 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 12115066820 in words is "twelve billion, one hundred fifteen million, sixty-six thousand, eight hundred twenty".