18868143 has 8 divisors (see below), whose sum is σ = 28751488. Its totient is φ = 10781784.

The previous prime is 18868139. The next prime is 18868151. The reversal of 18868143 is 34186881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18868143 - 2² = 18868139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449221 + ... + 449262.

It is an arithmetic number, because the mean of its divisors is an integer number (3593936).

Almost surely, 2^18868143 is an apocalyptic number.

18868143 is a deficient number, since it is larger than the sum of its proper divisors (9883345).

18868143 is an equidigital number, since it uses as much as digits as its factorization.

18868143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898493.

The product of its digits is 36864, while the sum is 39.

The square root of 18868143 is about 4343.7475755389. The cubic root of 18868143 is about 266.2214552043.

The spelling of 18868143 in words is "eighteen million, eight hundred sixty-eight thousand, one hundred forty-three".