2109197318 has 8 divisors (see below), whose sum is σ = 3272892480. Its totient is φ = 1018233160.

The previous prime is 2109197309. The next prime is 2109197323. The reversal of 2109197318 is 8137919012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18182678 + ... + 18182793.

It is an arithmetic number, because the mean of its divisors is an integer number (409111560).

Almost surely, 2^2109197318 is an apocalyptic number.

2109197318 is a deficient number, since it is larger than the sum of its proper divisors (1163695162).

2109197318 is a wasteful number, since it uses less digits than its factorization.

2109197318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36365502.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 2109197318 is about 45925.9982798415. The cubic root of 2109197318 is about 1282.4459492843.

The spelling of 2109197318 in words is "two billion, one hundred nine million, one hundred ninety-seven thousand, three hundred eighteen".