18081003 has 8 divisors (see below), whose sum is σ = 24563088. Its totient is φ = 11826464.

The previous prime is 18080999. The next prime is 18081023. The reversal of 18081003 is 30018081.

It is a happy number.

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 18081003 - 2² = 18080999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18081023) 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, 56700 + ... + 57017.

It is an arithmetic number, because the mean of its divisors is an integer number (3070386).

Almost surely, 2^18081003 is an apocalyptic number.

18081003 is a deficient number, since it is larger than the sum of its proper divisors (6482085).

18081003 is a wasteful number, since it uses less digits than its factorization.

18081003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113773.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 18081003 is about 4252.1762663370. The cubic root of 18081003 is about 262.4666769491.

Adding to 18081003 its reverse (30018081), we get a palindrome (48099084).

The spelling of 18081003 in words is "eighteen million, eighty-one thousand, three".