18040833 has 8 divisors (see below), whose sum is σ = 26727200. Its totient is φ = 12027204.

The previous prime is 18040831. The next prime is 18040879. The reversal of 18040833 is 33804081.

It is not a de Polignac number, because 18040833 - 2¹ = 18040831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 668179 = 18040833 / (1 + 8 + 0 + 4 + 0 + 8 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18040797 and 18040806.

It is not an unprimeable number, because it can be changed into a prime (18040831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334063 + ... + 334116.

It is an arithmetic number, because the mean of its divisors is an integer number (3340900).

Almost surely, 2^18040833 is an apocalyptic number.

It is an amenable number.

18040833 is a deficient number, since it is larger than the sum of its proper divisors (8686367).

18040833 is an equidigital number, since it uses as much as digits as its factorization.

18040833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668188 (or 668182 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18040833 is about 4247.4501762822. The cubic root of 18040833 is about 262.2721614870.

The spelling of 18040833 in words is "eighteen million, forty thousand, eight hundred thirty-three".