18106303 has 2 divisors, whose sum is σ = 18106304. Its totient is φ = 18106302.

The previous prime is 18106301. The next prime is 18106321. The reversal of 18106303 is 30360181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18106303 - 2¹ = 18106301 is a prime.

Together with 18106301, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18106301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053151 + 9053152.

It is an arithmetic number, because the mean of its divisors is an integer number (9053152).

Almost surely, 2^18106303 is an apocalyptic number.

18106303 is a deficient number, since it is larger than the sum of its proper divisors (1).

18106303 is an equidigital number, since it uses as much as digits as its factorization.

18106303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 18106303 is about 4255.1501736131. The cubic root of 18106303 is about 262.5890394847.

Adding to 18106303 its reverse (30360181), we get a palindrome (48466484).

The spelling of 18106303 in words is "eighteen million, one hundred six thousand, three hundred three".