18959099 has 2 divisors, whose sum is σ = 18959100. Its totient is φ = 18959098.

The previous prime is 18959089. The next prime is 18959117. The reversal of 18959099 is 99095981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18959099 - 2¹² = 18955003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18959089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9479549 + 9479550.

It is an arithmetic number, because the mean of its divisors is an integer number (9479550).

Almost surely, 2^18959099 is an apocalyptic number.

18959099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18959099 is an equidigital number, since it uses as much as digits as its factorization.

18959099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 50.

The square root of 18959099 is about 4354.2047494347. The cubic root of 18959099 is about 266.6485531099.

The spelling of 18959099 in words is "eighteen million, nine hundred fifty-nine thousand, ninety-nine".