2118309732 has 432 divisors, whose sum is σ = 7287361536. Its totient is φ = 526046400.

The previous prime is 2118309679. The next prime is 2118309751. The reversal of 2118309732 is 2379038112.

It is a super-2 number, since 2×2118309732² = 8974472241371823648, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 25521763 + ... + 25521845.

Almost surely, 2^2118309732 is an apocalyptic number.

2118309732 is a gapful number since it is divisible by the number (22) 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 2118309732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3643680768).

2118309732 is an abundant number, since it is smaller than the sum of its proper divisors (5169051804).

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

2118309732 is a wasteful number, since it uses less digits than its factorization.

2118309732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 2118309732 is about 46025.0989352549. The cubic root of 2118309732 is about 1284.2901562794.

The spelling of 2118309732 in words is "two billion, one hundred eighteen million, three hundred nine thousand, seven hundred thirty-two".