18010091 has 8 divisors (see below), whose sum is σ = 19790400. Its totient is φ = 16253640.

The previous prime is 18010079. The next prime is 18010093. The reversal of 18010091 is 19001081.

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

It is a cyclic number.

It is not a de Polignac number, because 18010091 - 2¹⁴ = 17993707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18010093) 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, 4361 + ... + 7418.

It is an arithmetic number, because the mean of its divisors is an integer number (2473800).

Almost surely, 2^18010091 is an apocalyptic number.

18010091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18010091 is a deficient number, since it is larger than the sum of its proper divisors (1780309).

18010091 is a wasteful number, since it uses less digits than its factorization.

18010091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11929.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 18010091 is about 4243.8297562461. The cubic root of 18010091 is about 262.1231041635.

The spelling of 18010091 in words is "eighteen million, ten thousand, ninety-one".