18071303 has 4 divisors (see below), whose sum is σ = 18172440. Its totient is φ = 17970168.

The previous prime is 18071297. The next prime is 18071351. The reversal of 18071303 is 30317081.

It is a happy number.

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

It is not a de Polignac number, because 18071303 - 2¹² = 18067207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18071363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50300 + ... + 50657.

It is an arithmetic number, because the mean of its divisors is an integer number (4543110).

Almost surely, 2^18071303 is an apocalyptic number.

18071303 is a deficient number, since it is larger than the sum of its proper divisors (101137).

18071303 is a wasteful number, since it uses less digits than its factorization.

18071303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101136.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 18071303 is about 4251.0355209055. The cubic root of 18071303 is about 262.4197329793.

Adding to 18071303 its reverse (30317081), we get a palindrome (48388384).

The spelling of 18071303 in words is "eighteen million, seventy-one thousand, three hundred three".