18406099 has 2 divisors, whose sum is σ = 18406100. Its totient is φ = 18406098.

The previous prime is 18406051. The next prime is 18406103. The reversal of 18406099 is 99060481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18406099 - 2⁹ = 18405587 is a prime.

It is not a weakly prime, because it can be changed into another prime (18406009) 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, 9203049 + 9203050.

It is an arithmetic number, because the mean of its divisors is an integer number (9203050).

Almost surely, 2^18406099 is an apocalyptic number.

18406099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18406099 is an equidigital number, since it uses as much as digits as its factorization.

18406099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 18406099 is about 4290.2329773568. The cubic root of 18406099 is about 264.0303904026.

The spelling of 18406099 in words is "eighteen million, four hundred six thousand, ninety-nine".