2118873312 has 144 divisors (see below), whose sum is σ = 6547806720. Its totient is φ = 647481600.

The previous prime is 2118873311. The next prime is 2118873347. The reversal of 2118873312 is 2133788112.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×2118873312² = 8979248224611698688, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (2118873311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163387 + ... + 175877.

It is an arithmetic number, because the mean of its divisors is an integer number (45470880).

Almost surely, 2^2118873312 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 2118873312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3273903360).

2118873312 is an abundant number, since it is smaller than the sum of its proper divisors (4428933408).

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

2118873312 is a wasteful number, since it uses less digits than its factorization.

2118873312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12557 (or 12546 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 2118873312 is about 46031.2210570174. The cubic root of 2118873312 is about 1284.4040420591.

The spelling of 2118873312 in words is "two billion, one hundred eighteen million, eight hundred seventy-three thousand, three hundred twelve".