18030101 has 2 divisors, whose sum is σ = 18030102. Its totient is φ = 18030100.

The previous prime is 18030079. The next prime is 18030109. The reversal of 18030101 is 10103081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14070001 + 3960100 = 3751^2 + 1990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18030101 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18030109) 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, 9015050 + 9015051.

It is an arithmetic number, because the mean of its divisors is an integer number (9015051).

Almost surely, 2^18030101 is an apocalyptic number.

It is an amenable number.

18030101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18030101 is an equidigital number, since it uses as much as digits as its factorization.

18030101 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 14.

The square root of 18030101 is about 4246.1866421532. The cubic root of 18030101 is about 262.2201449837.

Adding to 18030101 its reverse (10103081), we get a palindrome (28133182).

The spelling of 18030101 in words is "eighteen million, thirty thousand, one hundred one".