18005849 has 8 divisors (see below), whose sum is σ = 19144512. Its totient is φ = 16896880.

The previous prime is 18005843. The next prime is 18005861. The reversal of 18005849 is 94850081.

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 18005849 - 2⁸ = 18005593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18005843) 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, 6167 + ... + 8604.

It is an arithmetic number, because the mean of its divisors is an integer number (2393064).

Almost surely, 2^18005849 is an apocalyptic number.

It is an amenable number.

18005849 is a deficient number, since it is larger than the sum of its proper divisors (1138663).

18005849 is a wasteful number, since it uses less digits than its factorization.

18005849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14847.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18005849 is about 4243.3299423919. The cubic root of 18005849 is about 262.1025228586.

The spelling of 18005849 in words is "eighteen million, five thousand, eight hundred forty-nine".