18143030 has 16 divisors (see below), whose sum is σ = 32706720. Its totient is φ = 7246272.

The previous prime is 18143023. The next prime is 18143039. The reversal of 18143030 is 3034181.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 18142993 and 18143011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18143039) 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, 10487 + ... + 12093.

It is an arithmetic number, because the mean of its divisors is an integer number (2044170).

Almost surely, 2^18143030 is an apocalyptic number.

18143030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18143030 is a deficient number, since it is larger than the sum of its proper divisors (14563690).

18143030 is a wasteful number, since it uses less digits than its factorization.

18143030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 18143030 is about 4259.4635812506. The cubic root of 18143030 is about 262.7664656229.

The spelling of 18143030 in words is "eighteen million, one hundred forty-three thousand, thirty".