18113003 has 4 divisors (see below), whose sum is σ = 18128208. Its totient is φ = 18097800.

The previous prime is 18112999. The next prime is 18113009. The reversal of 18113003 is 30031181.

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

It is a cyclic number.

It is not a de Polignac number, because 18113003 - 2² = 18112999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18113009) 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, 5648 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (4532052).

Almost surely, 2^18113003 is an apocalyptic number.

18113003 is a deficient number, since it is larger than the sum of its proper divisors (15205).

18113003 is a wasteful number, since it uses less digits than its factorization.

18113003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15204.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 18113003 is about 4255.9373820582. The cubic root of 18113003 is about 262.6214247007.

Adding to 18113003 its reverse (30031181), we get a palindrome (48144184).

The spelling of 18113003 in words is "eighteen million, one hundred thirteen thousand, three".