18099047 has 2 divisors, whose sum is σ = 18099048. Its totient is φ = 18099046.

The previous prime is 18099043. The next prime is 18099049. The reversal of 18099047 is 74099081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18099047 - 2² = 18099043 is a prime.

Together with 18099049, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18099047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18099041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9049523 + 9049524.

It is an arithmetic number, because the mean of its divisors is an integer number (9049524).

Almost surely, 2^18099047 is an apocalyptic number.

18099047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18099047 is an equidigital number, since it uses as much as digits as its factorization.

18099047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 18099047 is about 4254.2974743193. The cubic root of 18099047 is about 262.5539577667.

The spelling of 18099047 in words is "eighteen million, ninety-nine thousand, forty-seven".