12017718 has 24 divisors (see below), whose sum is σ = 26310648. Its totient is φ = 3964032.

The previous prime is 12017713. The next prime is 12017741. The reversal of 12017718 is 81771021.

12017718 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 12017691 and 12017700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12017713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1696 + ... + 5187.

It is an arithmetic number, because the mean of its divisors is an integer number (1096277).

Almost surely, 2^12017718 is an apocalyptic number.

12017718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12017718 is an abundant number, since it is smaller than the sum of its proper divisors (14292930).

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

12017718 is a wasteful number, since it uses less digits than its factorization.

12017718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6988 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 12017718 is about 3466.6580448611. The cubic root of 12017718 is about 229.0554711383.

Adding to 12017718 its reverse (81771021), we get a palindrome (93788739).

The spelling of 12017718 in words is "twelve million, seventeen thousand, seven hundred eighteen".