18007091 has 8 divisors (see below), whose sum is σ = 19056384. Its totient is φ = 16980040.

The previous prime is 18007061. The next prime is 18007111. The reversal of 18007091 is 19070081.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18007091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18007091.

It is not an unprimeable number, because it can be changed into a prime (18007021) 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, 3881 + ... + 7146.

It is an arithmetic number, because the mean of its divisors is an integer number (2382048).

Almost surely, 2^18007091 is an apocalyptic number.

18007091 is a deficient number, since it is larger than the sum of its proper divisors (1049293).

18007091 is a wasteful number, since it uses less digits than its factorization.

18007091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 18007091 is about 4243.4762871966. The cubic root of 18007091 is about 262.1085491199.

The spelling of 18007091 in words is "eighteen million, seven thousand, ninety-one".