18182009091 has 8 divisors (see below), whose sum is σ = 24245381824. Its totient is φ = 12119987880.

The previous prime is 18182009089. The next prime is 18182009159. The reversal of 18182009091 is 19090028181.

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

It is not a de Polignac number, because 18182009091 - 2¹ = 18182009089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18182009011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306061 + ... + 360606.

It is an arithmetic number, because the mean of its divisors is an integer number (3030672728).

Almost surely, 2^18182009091 is an apocalyptic number.

18182009091 is a deficient number, since it is larger than the sum of its proper divisors (6063372733).

18182009091 is an equidigital number, since it uses as much as digits as its factorization.

18182009091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675761.

The product of its (nonzero) digits is 10368, while the sum is 39.

The spelling of 18182009091 in words is "eighteen billion, one hundred eighty-two million, nine thousand, ninety-one".