18182113 has 2 divisors, whose sum is σ = 18182114. Its totient is φ = 18182112.

The previous prime is 18182093. The next prime is 18182119. The reversal of 18182113 is 31128181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 1306449 = 4108^2 + 1143^2 .

It is a cyclic number.

It is not a de Polignac number, because 18182113 - 2⁹ = 18181601 is a prime.

It is not a weakly prime, because it can be changed into another prime (18182119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9091056 + 9091057.

It is an arithmetic number, because the mean of its divisors is an integer number (9091057).

Almost surely, 2^18182113 is an apocalyptic number.

It is an amenable number.

18182113 is a deficient number, since it is larger than the sum of its proper divisors (1).

18182113 is an equidigital number, since it uses as much as digits as its factorization.

18182113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 25.

The square root of 18182113 is about 4264.0488974682. The cubic root of 18182113 is about 262.9550106894.

The spelling of 18182113 in words is "eighteen million, one hundred eighty-two thousand, one hundred thirteen".