12128940318 has 32 divisors (see below), whose sum is σ = 26725168512. Its totient is φ = 3639044000.

The previous prime is 12128940287. The next prime is 12128940331. The reversal of 12128940318 is 81304982121.

It is a super-2 number, since 2×12128940318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903096 + ... + 916427.

It is an arithmetic number, because the mean of its divisors is an integer number (835161516).

Almost surely, 2^12128940318 is an apocalyptic number.

12128940318 is an abundant number, since it is smaller than the sum of its proper divisors (14596228194).

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

12128940318 is a wasteful number, since it uses less digits than its factorization.

12128940318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819640.

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 12128940318 in words is "twelve billion, one hundred twenty-eight million, nine hundred forty thousand, three hundred eighteen".