18375673 has 4 divisors (see below), whose sum is σ = 18509940. Its totient is φ = 18241408.

The previous prime is 18375631. The next prime is 18375677. The reversal of 18375673 is 37657381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9566649 + 8809024 = 3093^2 + 2968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18375673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18375677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66928 + ... + 67201.

It is an arithmetic number, because the mean of its divisors is an integer number (4627485).

Almost surely, 2^18375673 is an apocalyptic number.

It is an amenable number.

18375673 is a deficient number, since it is larger than the sum of its proper divisors (134267).

18375673 is a wasteful number, since it uses less digits than its factorization.

18375673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134266.

The product of its digits is 105840, while the sum is 40.

The square root of 18375673 is about 4286.6855494659. The cubic root of 18375673 is about 263.8848259853.

The spelling of 18375673 in words is "eighteen million, three hundred seventy-five thousand, six hundred seventy-three".