18843012 has 18 divisors (see below), whose sum is σ = 47631038. Its totient is φ = 6280992.

The previous prime is 18842981. The next prime is 18843023. The reversal of 18843012 is 21034881.

It can be written as a sum of positive squares in only one way, i.e., 18096516 + 746496 = 4254^2 + 864^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261673 + ... + 261744.

Almost surely, 2^18843012 is an apocalyptic number.

18843012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18843012 is an abundant number, since it is smaller than the sum of its proper divisors (28788026).

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

18843012 is a wasteful number, since it uses less digits than its factorization.

18843012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523427 (or 523422 counting only the distinct ones).

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

The square root of 18843012 is about 4340.8538330610. The cubic root of 18843012 is about 266.1032067900.

Adding to 18843012 its reverse (21034881), we get a palindrome (39877893).

The spelling of 18843012 in words is "eighteen million, eight hundred forty-three thousand, twelve".