2091718473 has 8 divisors (see below), whose sum is σ = 3003493248. Its totient is φ = 1287211344.

The previous prime is 2091718457. The next prime is 2091718481. The reversal of 2091718473 is 3748171902.

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

It is not a de Polignac number, because 2091718473 - 2⁴ = 2091718457 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2091718423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26816865 + ... + 26816942.

It is an arithmetic number, because the mean of its divisors is an integer number (375436656).

Almost surely, 2^2091718473 is an apocalyptic number.

It is an amenable number.

2091718473 is a deficient number, since it is larger than the sum of its proper divisors (911774775).

2091718473 is a wasteful number, since it uses less digits than its factorization.

2091718473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53633823.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 2091718473 is about 45735.3088215221. The cubic root of 2091718473 is about 1278.8935900157.

The spelling of 2091718473 in words is "two billion, ninety-one million, seven hundred eighteen thousand, four hundred seventy-three".