18418430 has 32 divisors (see below), whose sum is σ = 34292160. Its totient is φ = 7118080.

The previous prime is 18418427. The next prime is 18418441. The reversal of 18418430 is 3481481.

It is a junction number, because it is equal to n+sod(n) for n = 18418393 and 18418402.

It is a congruent number.

It is an unprimeable number.

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, 68336 + ... + 68604.

It is an arithmetic number, because the mean of its divisors is an integer number (1071630).

Almost surely, 2^18418430 is an apocalyptic number.

18418430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18418430 is a deficient number, since it is larger than the sum of its proper divisors (15873730).

18418430 is a wasteful number, since it uses less digits than its factorization.

18418430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 18418430 is about 4291.6698381865. The cubic root of 18418430 is about 264.0893388334.

The spelling of 18418430 in words is "eighteen million, four hundred eighteen thousand, four hundred thirty".