18201008 has 40 divisors (see below), whose sum is σ = 40726560. Its totient is φ = 7718400.

The previous prime is 18200977. The next prime is 18201011. The reversal of 18201008 is 80010281.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10508 + ... + 12116.

It is an arithmetic number, because the mean of its divisors is an integer number (1018164).

Almost surely, 2^18201008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18201008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20363280).

18201008 is an abundant number, since it is smaller than the sum of its proper divisors (22525552).

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

18201008 is a wasteful number, since it uses less digits than its factorization.

18201008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 18201008 is about 4266.2639393268. The cubic root of 18201008 is about 263.0460674844.

Adding to 18201008 its reverse (80010281), we get a palindrome (98211289).

The spelling of 18201008 in words is "eighteen million, two hundred one thousand, eight".