18814143 has 4 divisors (see below), whose sum is σ = 25085528. Its totient is φ = 12542760.

The previous prime is 18814141. The next prime is 18814151. The reversal of 18814143 is 34141881.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18814143 - 2¹ = 18814141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18814143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18814141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3135688 + ... + 3135693.

It is an arithmetic number, because the mean of its divisors is an integer number (6271382).

Almost surely, 2^18814143 is an apocalyptic number.

18814143 is a deficient number, since it is larger than the sum of its proper divisors (6271385).

18814143 is an equidigital number, since it uses as much as digits as its factorization.

18814143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271384.

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

The square root of 18814143 is about 4337.5272909804. The cubic root of 18814143 is about 265.9672402040.

The spelling of 18814143 in words is "eighteen million, eight hundred fourteen thousand, one hundred forty-three".