18033489 has 16 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 11389248.

The previous prime is 18033479. The next prime is 18033497. The reversal of 18033489 is 98433081.

It is not a de Polignac number, because 18033489 - 2⁴ = 18033473 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18033439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17064 + ... + 18089.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^18033489 is an apocalyptic number.

18033489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18033489 is a deficient number, since it is larger than the sum of its proper divisors (10089711).

18033489 is a wasteful number, since it uses less digits than its factorization.

18033489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35181 (or 35175 counting only the distinct ones).

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

The square root of 18033489 is about 4246.5855696077. The cubic root of 18033489 is about 262.2365683749.

The spelling of 18033489 in words is "eighteen million, thirty-three thousand, four hundred eighty-nine".