18026199 has 16 divisors (see below), whose sum is σ = 26796000. Its totient is φ = 11976768.

The previous prime is 18026179. The next prime is 18026213. The reversal of 18026199 is 99162081.

It is not a de Polignac number, because 18026199 - 2⁵ = 18026167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18026179) 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 in 15 ways as a sum of consecutive naturals, for example, 8467 + ... + 10379.

It is an arithmetic number, because the mean of its divisors is an integer number (1674750).

Almost surely, 2^18026199 is an apocalyptic number.

18026199 is a deficient number, since it is larger than the sum of its proper divisors (8769801).

18026199 is a wasteful number, since it uses less digits than its factorization.

18026199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271 (or 2265 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 18026199 is about 4245.7271462024. The cubic root of 18026199 is about 262.2012274186.

It can be divided in two parts, 18026 and 199, that added together give a square (18225 = 135²).

The spelling of 18026199 in words is "eighteen million, twenty-six thousand, one hundred ninety-nine".