2318181888 has 120 divisors (see below), whose sum is σ = 6788799864. Its totient is φ = 702423040.

The previous prime is 2318181883. The next prime is 2318181913. The reversal of 2318181888 is 8881818132.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2318181883) 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, 179620 + ... + 192092.

Almost surely, 2^2318181888 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 2318181888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3394399932).

2318181888 is an abundant number, since it is smaller than the sum of its proper divisors (4470617976).

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

2318181888 is a wasteful number, since it uses less digits than its factorization.

2318181888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12516 (or 12489 counting only the distinct ones).

The product of its digits is 196608, while the sum is 48.

The square root of 2318181888 is about 48147.5013681915. The cubic root of 2318181888 is about 1323.4752867043.

The spelling of 2318181888 in words is "two billion, three hundred eighteen million, one hundred eighty-one thousand, eight hundred eighty-eight".