18147001 has 2 divisors, whose sum is σ = 18147002. Its totient is φ = 18147000.

The previous prime is 18146993. The next prime is 18147053. The reversal of 18147001 is 10074181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12787776 + 5359225 = 3576^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 18147001 - 2³ = 18146993 is a prime.

It is not a weakly prime, because it can be changed into another prime (18147401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9073500 + 9073501.

It is an arithmetic number, because the mean of its divisors is an integer number (9073501).

Almost surely, 2^18147001 is an apocalyptic number.

It is an amenable number.

18147001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18147001 is an equidigital number, since it uses as much as digits as its factorization.

18147001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 18147001 is about 4259.9296942555. The cubic root of 18147001 is about 262.7856349590.

The spelling of 18147001 in words is "eighteen million, one hundred forty-seven thousand, one".