18000901 has 2 divisors, whose sum is σ = 18000902. Its totient is φ = 18000900.

The previous prime is 18000893. The next prime is 18000919. The reversal of 18000901 is 10900081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 7568001 = 3230^2 + 2751^2 .

It is an emirp because it is prime and its reverse (10900081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18000901 - 2³ = 18000893 is a prime.

It is a Chen prime.

It is equal to p_1151425 and since 18000901 and 1151425 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18000971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000450 + 9000451.

It is an arithmetic number, because the mean of its divisors is an integer number (9000451).

Almost surely, 2^18000901 is an apocalyptic number.

It is an amenable number.

18000901 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000901 is an equidigital number, since it uses as much as digits as its factorization.

18000901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 18000901 is about 4242.7468696589. The cubic root of 18000901 is about 262.0785121035.

Adding to 18000901 its reverse (10900081), we get a palindrome (28900982).

The spelling of 18000901 in words is "eighteen million, nine hundred one", and thus it is an aban number.