18844930 has 16 divisors (see below), whose sum is σ = 36530424. Its totient is φ = 6958080.

The previous prime is 18844909. The next prime is 18844933. The reversal of 18844930 is 3944881.

It can be written as a sum of positive squares in 4 ways, for example, as 12327121 + 6517809 = 3511^2 + 2553^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18844930.

It is not an unprimeable number, because it can be changed into a prime (18844933) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 72351 + ... + 72610.

Almost surely, 2^18844930 is an apocalyptic number.

18844930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18844930 is a deficient number, since it is larger than the sum of its proper divisors (17685494).

18844930 is a wasteful number, since it uses less digits than its factorization.

18844930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144981.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 18844930 is about 4341.0747517176. The cubic root of 18844930 is about 266.1122352233.

The spelling of 18844930 in words is "eighteen million, eight hundred forty-four thousand, nine hundred thirty".