18003001 has 2 divisors, whose sum is σ = 18003002. Its totient is φ = 18003000.

The previous prime is 18002993. The next prime is 18003019. The reversal of 18003001 is 10030081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12243001 + 5760000 = 3499^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 18003001 - 2³ = 18002993 is a prime.

It is a pancake number, because a pancake can be divided into 18003001 parts by 6000 straight cuts.

It is not a weakly prime, because it can be changed into another prime (18003701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9001500 + 9001501.

It is an arithmetic number, because the mean of its divisors is an integer number (9001501).

Almost surely, 2^18003001 is an apocalyptic number.

It is an amenable number.

18003001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18003001 is an equidigital number, since it uses as much as digits as its factorization.

18003001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 18003001 is about 4242.9943436210. The cubic root of 18003001 is about 262.0887031392.

Adding to 18003001 its reverse (10030081), we get a palindrome (28033082).

The spelling of 18003001 in words is "eighteen million, three thousand, one".