18402282 has 32 divisors (see below), whose sum is σ = 42216960. Its totient is φ = 5935680.

The previous prime is 18402281. The next prime is 18402299. The reversal of 18402282 is 28220481.

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 (18402281) 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 15 ways as a sum of consecutive naturals, for example, 3823 + ... + 7170.

It is an arithmetic number, because the mean of its divisors is an integer number (1319280).

Almost surely, 2^18402282 is an apocalyptic number.

18402282 is an abundant number, since it is smaller than the sum of its proper divisors (23814678).

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

18402282 is a wasteful number, since it uses less digits than its factorization.

18402282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11035 (or 11029 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 18402282 is about 4289.7881066552. The cubic root of 18402282 is about 264.0121378717.

The spelling of 18402282 in words is "eighteen million, four hundred two thousand, two hundred eighty-two".