18043849 has 8 divisors (see below), whose sum is σ = 18345600. Its totient is φ = 17744736.

The previous prime is 18043847. The next prime is 18043867. The reversal of 18043849 is 94834081.

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 18043849 - 2¹ = 18043847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18043841) 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, 16677 + ... + 17725.

It is an arithmetic number, because the mean of its divisors is an integer number (2293200).

Almost surely, 2^18043849 is an apocalyptic number.

It is an amenable number.

18043849 is a deficient number, since it is larger than the sum of its proper divisors (301751).

18043849 is a wasteful number, since it uses less digits than its factorization.

18043849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18043849 is about 4247.8051979817. The cubic root of 18043849 is about 262.2867759039.

The spelling of 18043849 in words is "eighteen million, forty-three thousand, eight hundred forty-nine".