18412 has 6 divisors (see below), whose sum is σ = 32228. Its totient is φ = 9204.

The previous prime is 18401. The next prime is 18413. The reversal of 18412 is 21481.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18413) by changing a digit.

18412 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2298 + ... + 2305.

2¹⁸⁴¹² is an apocalyptic number.

It is an amenable number.

18412 is a deficient number, since it is larger than the sum of its proper divisors (13816).

18412 is a wasteful number, since it uses less digits than its factorization.

18412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 18412 is about 135.6908250399. The cubic root of 18412 is about 26.4058603458.

Adding to 18412 its reverse (21481), we get a palindrome (39893).

It can be divided in two parts, 184 and 12, that added together give a square (196 = 14²).

The spelling of 18412 in words is "eighteen thousand, four hundred twelve".