18213282 has 16 divisors (see below), whose sum is σ = 40474080. Its totient is φ = 6071076.

The previous prime is 18213277. The next prime is 18213289. The reversal of 18213282 is 28231281.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18213289) 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, 168588 + ... + 168695.

It is an arithmetic number, because the mean of its divisors is an integer number (2529630).

Almost surely, 2^18213282 is an apocalyptic number.

18213282 is an abundant number, since it is smaller than the sum of its proper divisors (22260798).

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

18213282 is a wasteful number, since it uses less digits than its factorization.

18213282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337294 (or 337288 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 18213282 is about 4267.7021920467. The cubic root of 18213282 is about 263.1051832936.

The spelling of 18213282 in words is "eighteen million, two hundred thirteen thousand, two hundred eighty-two".