18439099 has 8 divisors (see below), whose sum is σ = 21800160. Its totient is φ = 15259776.

The previous prime is 18439097. The next prime is 18439103. The reversal of 18439099 is 99093481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18439099 - 2¹ = 18439097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18439097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45214 + ... + 45619.

It is an arithmetic number, because the mean of its divisors is an integer number (2725020).

Almost surely, 2^18439099 is an apocalyptic number.

18439099 is a deficient number, since it is larger than the sum of its proper divisors (3361061).

18439099 is an equidigital number, since it uses as much as digits as its factorization.

18439099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90869.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 18439099 is about 4294.0772000513. The cubic root of 18439099 is about 264.1880881478.

The spelling of 18439099 in words is "eighteen million, four hundred thirty-nine thousand, ninety-nine".