2318218812 has 288 divisors, whose sum is σ = 7779287040. Its totient is φ = 591131520.

The previous prime is 2318218789. The next prime is 2318218841. The reversal of 2318218812 is 2188128132.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2132133 + ... + 2133219.

Almost surely, 2^2318218812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2318218812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3889643520).

2318218812 is an abundant number, since it is smaller than the sum of its proper divisors (5461068228).

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

2318218812 is a wasteful number, since it uses less digits than its factorization.

2318218812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1143 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 2318218812 is about 48147.8848133540. The cubic root of 2318218812 is about 1323.4823134383.

The spelling of 2318218812 in words is "two billion, three hundred eighteen million, two hundred eighteen thousand, eight hundred twelve".