18806107 has 2 divisors, whose sum is σ = 18806108. Its totient is φ = 18806106.

The previous prime is 18806077. The next prime is 18806141. The reversal of 18806107 is 70160881.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18806107 is a prime.

It is not a weakly prime, because it can be changed into another prime (18806147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9403053 + 9403054.

It is an arithmetic number, because the mean of its divisors is an integer number (9403054).

Almost surely, 2^18806107 is an apocalyptic number.

18806107 is a deficient number, since it is larger than the sum of its proper divisors (1).

18806107 is an equidigital number, since it uses as much as digits as its factorization.

18806107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 18806107 is about 4336.6008578148. The cubic root of 18806107 is about 265.9293676823.

Adding to 18806107 its reverse (70160881), we get a palindrome (88966988).

The spelling of 18806107 in words is "eighteen million, eight hundred six thousand, one hundred seven".