18289739 has 8 divisors (see below), whose sum is σ = 20855520. Its totient is φ = 15889536.

The previous prime is 18289709. The next prime is 18289751. The reversal of 18289739 is 93798281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18289739 - 2⁸ = 18289483 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18289693 and 18289702.

It is not an unprimeable number, because it can be changed into a prime (18289709) 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 7 ways as a sum of consecutive naturals, for example, 41159 + ... + 41600.

It is an arithmetic number, because the mean of its divisors is an integer number (2606940).

Almost surely, 2^18289739 is an apocalyptic number.

18289739 is a deficient number, since it is larger than the sum of its proper divisors (2565781).

18289739 is a wasteful number, since it uses less digits than its factorization.

18289739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82789.

The product of its digits is 217728, while the sum is 47.

The square root of 18289739 is about 4276.6504416424. The cubic root of 18289739 is about 263.4728298279.

The spelling of 18289739 in words is "eighteen million, two hundred eighty-nine thousand, seven hundred thirty-nine".