18668099 has 2 divisors, whose sum is σ = 18668100. Its totient is φ = 18668098.

The previous prime is 18668077. The next prime is 18668119. The reversal of 18668099 is 99086681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18668099 is a prime.

It is not a weakly prime, because it can be changed into another prime (18668059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334049 + 9334050.

It is an arithmetic number, because the mean of its divisors is an integer number (9334050).

Almost surely, 2^18668099 is an apocalyptic number.

18668099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18668099 is an equidigital number, since it uses as much as digits as its factorization.

18668099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 18668099 is about 4320.6595561326. The cubic root of 18668099 is about 265.2772652770.

The spelling of 18668099 in words is "eighteen million, six hundred sixty-eight thousand, ninety-nine".