2118910985 has 8 divisors (see below), whose sum is σ = 2543063040. Its totient is φ = 1694882224.

The previous prime is 2118910961. The next prime is 2118910999. The reversal of 2118910985 is 5890198112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2118910985 - 2¹⁴ = 2118894601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12536 + ... + 66294.

It is an arithmetic number, because the mean of its divisors is an integer number (317882880).

Almost surely, 2^2118910985 is an apocalyptic number.

It is an amenable number.

2118910985 is a deficient number, since it is larger than the sum of its proper divisors (424152055).

2118910985 is an equidigital number, since it uses as much as digits as its factorization.

2118910985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61647.

The product of its (nonzero) digits is 51840, while the sum is 44.

The square root of 2118910985 is about 46031.6302665895. The cubic root of 2118910985 is about 1284.4116541340.

The spelling of 2118910985 in words is "two billion, one hundred eighteen million, nine hundred ten thousand, nine hundred eighty-five".