18955099 has 2 divisors, whose sum is σ = 18955100. Its totient is φ = 18955098.

The previous prime is 18955093. The next prime is 18955127. The reversal of 18955099 is 99055981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18955099 - 2¹⁷ = 18824027 is a prime.

It is not a weakly prime, because it can be changed into another prime (18955093) 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, 9477549 + 9477550.

It is an arithmetic number, because the mean of its divisors is an integer number (9477550).

Almost surely, 2^18955099 is an apocalyptic number.

18955099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18955099 is an equidigital number, since it uses as much as digits as its factorization.

18955099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 18955099 is about 4353.7453990788. The cubic root of 18955099 is about 266.6297992435.

The spelling of 18955099 in words is "eighteen million, nine hundred fifty-five thousand, ninety-nine".