2118590923 has 4 divisors (see below), whose sum is σ = 2119192768. Its totient is φ = 2117989080.

The previous prime is 2118590899. The next prime is 2118590959. The reversal of 2118590923 is 3290958112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2118590923 - 2¹³ = 2118582731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118590423) 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 3 ways as a sum of consecutive naturals, for example, 295611 + ... + 302692.

It is an arithmetic number, because the mean of its divisors is an integer number (529798192).

Almost surely, 2^2118590923 is an apocalyptic number.

2118590923 is a deficient number, since it is larger than the sum of its proper divisors (601845).

2118590923 is an equidigital number, since it uses as much as digits as its factorization.

2118590923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601844.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 2118590923 is about 46028.1535910360. The cubic root of 2118590923 is about 1284.3469806506.

The spelling of 2118590923 in words is "two billion, one hundred eighteen million, five hundred ninety thousand, nine hundred twenty-three".