1218321468 has 144 divisors (see below), whose sum is σ = 3804143616. Its totient is φ = 320146560.

The previous prime is 1218321457. The next prime is 1218321469. The reversal of 1218321468 is 8641238121.

1218321468 is a `hidden beast` number, since 12 + 183 + 2 + 1 + 468 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218321469) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1254223 + ... + 1255193.

It is an arithmetic number, because the mean of its divisors is an integer number (26417664).

Almost surely, 2^1218321468 is an apocalyptic number.

1218321468 is a gapful number since it is divisible by the number (18) 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 1218321468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1902071808).

1218321468 is an abundant number, since it is smaller than the sum of its proper divisors (2585822148).

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

1218321468 is a wasteful number, since it uses less digits than its factorization.

1218321468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1379 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1218321468 is about 34904.4620070271. The cubic root of 1218321468 is about 1068.0394611519.

Adding to 1218321468 its reverse (8641238121), we get a palindrome (9859559589).

The spelling of 1218321468 in words is "one billion, two hundred eighteen million, three hundred twenty-one thousand, four hundred sixty-eight".