2118797988 has 24 divisors (see below), whose sum is σ = 4948415808. Its totient is φ = 705615456.

The previous prime is 2118797981. The next prime is 2118797999. The reversal of 2118797988 is 8897978112.

It is not an unprimeable number, because it can be changed into a prime (2118797981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67656 + ... + 93887.

It is an arithmetic number, because the mean of its divisors is an integer number (206183992).

Almost surely, 2^2118797988 is an apocalyptic number.

It is an amenable number.

2118797988 is an abundant number, since it is smaller than the sum of its proper divisors (2829617820).

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

2118797988 is a wasteful number, since it uses less digits than its factorization.

2118797988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162643 (or 162641 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 60.

The square root of 2118797988 is about 46030.4028659320. The cubic root of 2118797988 is about 1284.3888220841.

The spelling of 2118797988 in words is "two billion, one hundred eighteen million, seven hundred ninety-seven thousand, nine hundred eighty-eight".