18430 has 16 divisors (see below), whose sum is σ = 35280. Its totient is φ = 6912.

The previous prime is 18427. The next prime is 18433. The reversal of 18430 is 3481.

It is an interprime number because it is at equal distance from previous prime (18427) and next prime (18433).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18433) 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, 142 + ... + 238.

It is an arithmetic number, because the mean of its divisors is an integer number (2205).

2¹⁸⁴³⁰ is an apocalyptic number.

18430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18430 is a deficient number, since it is larger than the sum of its proper divisors (16850).

18430 is a wasteful number, since it uses less digits than its factorization.

18430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 18430 is about 135.7571360924. The cubic root of 18430 is about 26.4144625378.

The spelling of 18430 in words is "eighteen thousand, four hundred thirty".