18150018 has 8 divisors (see below), whose sum is σ = 36300048. Its totient is φ = 6050004.

The previous prime is 18149983. The next prime is 18150019. The reversal of 18150018 is 81005181.

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

18150018 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 18150018.

It is not an unprimeable number, because it can be changed into a prime (18150019) 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, 1512496 + ... + 1512507.

It is an arithmetic number, because the mean of its divisors is an integer number (4537506).

Almost surely, 2^18150018 is an apocalyptic number.

18150018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18150018 is a wasteful number, since it uses less digits than its factorization.

18150018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025008.

The product of its (nonzero) digits is 320, while the sum is 24.

The square root of 18150018 is about 4260.2837933640. The cubic root of 18150018 is about 262.8001971508.

Adding to 18150018 its reverse (81005181), we get a palindrome (99155199).

The spelling of 18150018 in words is "eighteen million, one hundred fifty thousand, eighteen".