18842330 has 16 divisors (see below), whose sum is σ = 36525384. Its totient is φ = 6957120.

The previous prime is 18842323. The next prime is 18842339. The reversal of 18842330 is 3324881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7546009 + 11296321 = 2747^2 + 3361^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18842293 and 18842302.

It is not an unprimeable number, because it can be changed into a prime (18842339) 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 7 ways as a sum of consecutive naturals, for example, 72341 + ... + 72600.

Almost surely, 2^18842330 is an apocalyptic number.

18842330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18842330 is a deficient number, since it is larger than the sum of its proper divisors (17683054).

18842330 is a wasteful number, since it uses less digits than its factorization.

18842330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144961.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 18842330 is about 4340.7752763763. The cubic root of 18842330 is about 266.0999963235.

The spelling of 18842330 in words is "eighteen million, eight hundred forty-two thousand, three hundred thirty".