2180890918 has 8 divisors (see below), whose sum is σ = 3275372520. Its totient is φ = 1089100080.

The previous prime is 2180890913. The next prime is 2180890919. The reversal of 2180890918 is 8190980812.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180890913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670663 + ... + 673906.

It is an arithmetic number, because the mean of its divisors is an integer number (409421565).

Almost surely, 2^2180890918 is an apocalyptic number.

2180890918 is a deficient number, since it is larger than the sum of its proper divisors (1094481602).

2180890918 is a wasteful number, since it uses less digits than its factorization.

2180890918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345382.

The product of its (nonzero) digits is 82944, while the sum is 46.

The square root of 2180890918 is about 46700.0098286928. The cubic root of 2180890918 is about 1296.8148687525.

The spelling of 2180890918 in words is "two billion, one hundred eighty million, eight hundred ninety thousand, nine hundred eighteen".