18412001 has 2 divisors, whose sum is σ = 18412002. Its totient is φ = 18412000.

The previous prime is 18411989. The next prime is 18412027. The reversal of 18412001 is 10021481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16974400 + 1437601 = 4120^2 + 1199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18412001 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18412061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9206000 + 9206001.

It is an arithmetic number, because the mean of its divisors is an integer number (9206001).

Almost surely, 2^18412001 is an apocalyptic number.

It is an amenable number.

18412001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18412001 is an equidigital number, since it uses as much as digits as its factorization.

18412001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 18412001 is about 4290.9207636590. The cubic root of 18412001 is about 264.0586082383.

Adding to 18412001 its reverse (10021481), we get a palindrome (28433482).

The spelling of 18412001 in words is "eighteen million, four hundred twelve thousand, one".