18145003 has 2 divisors, whose sum is σ = 18145004. Its totient is φ = 18145002.

The previous prime is 18144991. The next prime is 18145009. The reversal of 18145003 is 30054181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18145003 is a prime.

It is a super-2 number, since 2×18145003² = 658482267740018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18145009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072501 + 9072502.

It is an arithmetic number, because the mean of its divisors is an integer number (9072502).

Almost surely, 2^18145003 is an apocalyptic number.

18145003 is a deficient number, since it is larger than the sum of its proper divisors (1).

18145003 is an equidigital number, since it uses as much as digits as its factorization.

18145003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 18145003 is about 4259.6951768877. The cubic root of 18145003 is about 262.7759902989.

Adding to 18145003 its reverse (30054181), we get a palindrome (48199184).

The spelling of 18145003 in words is "eighteen million, one hundred forty-five thousand, three".