18218202 has 8 divisors (see below), whose sum is σ = 36436416. Its totient is φ = 6072732.

The previous prime is 18218191. The next prime is 18218209. The reversal of 18218202 is 20281281.

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

18218202 is an admirable number.

It is a super-2 number, since 2×18218202² = 663805768225608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18218209) 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, 1518178 + ... + 1518189.

It is an arithmetic number, because the mean of its divisors is an integer number (4554552).

Almost surely, 2^18218202 is an apocalyptic number.

18218202 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.

18218202 is a wasteful number, since it uses less digits than its factorization.

18218202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036372.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 18218202 is about 4268.2785757258. The cubic root of 18218202 is about 263.1288722506.

Adding to 18218202 its reverse (20281281), we get a palindrome (38499483).

The spelling of 18218202 in words is "eighteen million, two hundred eighteen thousand, two hundred two".