18458099 has 4 divisors (see below), whose sum is σ = 20136120. Its totient is φ = 16780080.

The previous prime is 18458093. The next prime is 18458117. The reversal of 18458099 is 99085481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99085481 = 11 ⋅9007771.

It is a cyclic number.

It is not a de Polignac number, because 18458099 - 2¹² = 18454003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18458093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838994 + ... + 839015.

It is an arithmetic number, because the mean of its divisors is an integer number (5034030).

Almost surely, 2^18458099 is an apocalyptic number.

18458099 is a deficient number, since it is larger than the sum of its proper divisors (1678021).

18458099 is a wasteful number, since it uses less digits than its factorization.

18458099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678020.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 18458099 is about 4296.2889800385. The cubic root of 18458099 is about 264.2787984833.

The spelling of 18458099 in words is "eighteen million, four hundred fifty-eight thousand, ninety-nine".