18030113 has 2 divisors, whose sum is σ = 18030114. Its totient is φ = 18030112.

The previous prime is 18030109. The next prime is 18030121. The reversal of 18030113 is 31103081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15618304 + 2411809 = 3952^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 18030113 - 2² = 18030109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18030091 and 18030100.

It is not a weakly prime, because it can be changed into another prime (18030143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9015056 + 9015057.

It is an arithmetic number, because the mean of its divisors is an integer number (9015057).

Almost surely, 2^18030113 is an apocalyptic number.

It is an amenable number.

18030113 is a deficient number, since it is larger than the sum of its proper divisors (1).

18030113 is an equidigital number, since it uses as much as digits as its factorization.

18030113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 18030113 is about 4246.1880551855. The cubic root of 18030113 is about 262.2202031575.

Adding to 18030113 its reverse (31103081), we get a palindrome (49133194).

The spelling of 18030113 in words is "eighteen million, thirty thousand, one hundred thirteen".