18201003 has 8 divisors (see below), whose sum is σ = 24924048. Its totient is φ = 11805984.

The previous prime is 18200977. The next prime is 18201011. The reversal of 18201003 is 30010281.

It is a happy number.

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

It is not a de Polignac number, because 18201003 - 2⁵ = 18200971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18201013) 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, 81876 + ... + 82097.

It is an arithmetic number, because the mean of its divisors is an integer number (3115506).

Almost surely, 2^18201003 is an apocalyptic number.

18201003 is a deficient number, since it is larger than the sum of its proper divisors (6723045).

18201003 is a wasteful number, since it uses less digits than its factorization.

18201003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164013.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 18201003 is about 4266.2633533339. The cubic root of 18201003 is about 263.0460433972.

Adding to 18201003 its reverse (30010281), we get a palindrome (48211284).

The spelling of 18201003 in words is "eighteen million, two hundred one thousand, three".