12006017856 has 112 divisors (see below), whose sum is σ = 40337719680. Its totient is φ = 3430287360.

The previous prime is 12006017851. The next prime is 12006017857. The reversal of 12006017856 is 65871060021.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12006017856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12006017851) 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, 484185 + ... + 508376.

Almost surely, 2^12006017856 is an apocalyptic number.

12006017856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12006017856 is an abundant number, since it is smaller than the sum of its proper divisors (28331701824).

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

12006017856 is an equidigital number, since it uses as much as digits as its factorization.

12006017856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992589 (or 992573 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

Adding to 12006017856 its reverse (65871060021), we get a palindrome (77877077877).

The spelling of 12006017856 in words is "twelve billion, six million, seventeen thousand, eight hundred fifty-six".