18120303 has 6 divisors (see below), whose sum is σ = 26173784. Its totient is φ = 12080196.

The previous prime is 18120287. The next prime is 18120307. The reversal of 18120303 is 30302181.

It is not a de Polignac number, because 18120303 - 2⁴ = 18120287 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 (18120307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1006675 + ... + 1006692.

Almost surely, 2^18120303 is an apocalyptic number.

18120303 is a deficient number, since it is larger than the sum of its proper divisors (8053481).

18120303 is a wasteful number, since it uses less digits than its factorization.

18120303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013373 (or 2013370 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 18120303 is about 4256.7949210644. The cubic root of 18120303 is about 262.6567009956.

Adding to 18120303 its reverse (30302181), we get a palindrome (48422484).

The spelling of 18120303 in words is "eighteen million, one hundred twenty thousand, three hundred three".