18013303 has 8 divisors (see below), whose sum is σ = 22458240. Its totient is φ = 14036280.

The previous prime is 18013297. The next prime is 18013313. The reversal of 18013303 is 30331081.

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

It is a cyclic number.

It is not a de Polignac number, because 18013303 - 2²¹ = 15916151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116893 + ... + 117046.

It is an arithmetic number, because the mean of its divisors is an integer number (2807280).

Almost surely, 2^18013303 is an apocalyptic number.

18013303 is a deficient number, since it is larger than the sum of its proper divisors (4444937).

18013303 is a wasteful number, since it uses less digits than its factorization.

18013303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233957.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 18013303 is about 4244.2081711434. The cubic root of 18013303 is about 262.1386859719.

Adding to 18013303 its reverse (30331081), we get a palindrome (48344384).

The spelling of 18013303 in words is "eighteen million, thirteen thousand, three hundred three".