12018778509822 has 192 divisors, whose sum is σ = 29690707521024. Its totient is φ = 3222804049920.

The previous prime is 12018778509821. The next prime is 12018778509841. The reversal of 12018778509822 is 22890587781021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12018778509821) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3470624463 + ... + 3470627925.

It is an arithmetic number, because the mean of its divisors is an integer number (154639101672).

Almost surely, 2^{12018778509822} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12018778509822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14845353760512).

12018778509822 is an abundant number, since it is smaller than the sum of its proper divisors (17671929011202).

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

12018778509822 is a wasteful number, since it uses less digits than its factorization.

12018778509822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263 (or 5256 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 60.

The spelling of 12018778509822 in words is "twelve trillion, eighteen billion, seven hundred seventy-eight million, five hundred nine thousand, eight hundred twenty-two".