18230202 has 12 divisors (see below), whose sum is σ = 39498810. Its totient is φ = 6076728.

The previous prime is 18230161. The next prime is 18230207. The reversal of 18230202 is 20203281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18071001 + 159201 = 4251^2 + 399^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1012789 = 18230202 / (1 + 8 + 2 + 3 + 0 + 2 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (18230207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506377 + ... + 506412.

Almost surely, 2^18230202 is an apocalyptic number.

18230202 is an abundant number, since it is smaller than the sum of its proper divisors (21268608).

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

18230202 is a wasteful number, since it uses less digits than its factorization.

18230202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012797 (or 1012794 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 18230202 is about 4269.6840632534. The cubic root of 18230202 is about 263.1866323129.

Adding to 18230202 its reverse (20203281), we get a palindrome (38433483).

The spelling of 18230202 in words is "eighteen million, two hundred thirty thousand, two hundred two".