18018849 has 8 divisors (see below), whose sum is σ = 24584032. Its totient is φ = 11733120.

The previous prime is 18018841. The next prime is 18018883. The reversal of 18018849 is 94881081.

It is a happy number.

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

It is not a de Polignac number, because 18018849 - 2³ = 18018841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18018841) 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, 69712 + ... + 69969.

It is an arithmetic number, because the mean of its divisors is an integer number (3073004).

Almost surely, 2^18018849 is an apocalyptic number.

It is an amenable number.

18018849 is a deficient number, since it is larger than the sum of its proper divisors (6565183).

18018849 is a wasteful number, since it uses less digits than its factorization.

18018849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139727.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 18018849 is about 4244.8614818390. The cubic root of 18018849 is about 262.1655859427.

The spelling of 18018849 in words is "eighteen million, eighteen thousand, eight hundred forty-nine".