18149099 has 4 divisors (see below), whose sum is σ = 18774960. Its totient is φ = 17523240.

The previous prime is 18149071. The next prime is 18149111. The reversal of 18149099 is 99094181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99094181 = 1087 ⋅91163.

It is a cyclic number.

It is not a de Polignac number, because 18149099 - 2¹² = 18145003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18149039) 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, 312887 + ... + 312944.

It is an arithmetic number, because the mean of its divisors is an integer number (4693740).

Almost surely, 2^18149099 is an apocalyptic number.

18149099 is a deficient number, since it is larger than the sum of its proper divisors (625861).

18149099 is an equidigital number, since it uses as much as digits as its factorization.

18149099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625860.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 18149099 is about 4260.1759353341. The cubic root of 18149099 is about 262.7957615729.

The spelling of 18149099 in words is "eighteen million, one hundred forty-nine thousand, ninety-nine".