18143814 has 32 divisors (see below), whose sum is σ = 39241440. Its totient is φ = 5559552.

The previous prime is 18143791. The next prime is 18143863. The reversal of 18143814 is 41834181.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35392 + ... + 35900.

It is an arithmetic number, because the mean of its divisors is an integer number (1226295).

Almost surely, 2^18143814 is an apocalyptic number.

18143814 is an abundant number, since it is smaller than the sum of its proper divisors (21097626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18143814 is a wasteful number, since it uses less digits than its factorization.

18143814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984.

The product of its digits is 3072, while the sum is 30.

The square root of 18143814 is about 4259.5556106242. Note that the first 3 decimals coincide. The cubic root of 18143814 is about 262.7702504729.

Adding to 18143814 its reverse (41834181), we get a palindrome (59977995).

The spelling of 18143814 in words is "eighteen million, one hundred forty-three thousand, eight hundred fourteen".