18033849 has 6 divisors (see below), whose sum is σ = 26048906. Its totient is φ = 12022560.

The previous prime is 18033839. The next prime is 18033913. The reversal of 18033849 is 94833081.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 1166400 = 4107^2 + 1080^2 .

It is not a de Polignac number, because 18033849 - 2⁸ = 18033593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18033839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1001872 + ... + 1001889.

Almost surely, 2^18033849 is an apocalyptic number.

It is an amenable number.

18033849 is a deficient number, since it is larger than the sum of its proper divisors (8015057).

18033849 is a wasteful number, since it uses less digits than its factorization.

18033849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003767 (or 2003764 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 18033849 is about 4246.6279563908. The cubic root of 18033849 is about 262.2383133605.

The spelling of 18033849 in words is "eighteen million, thirty-three thousand, eight hundred forty-nine".