18866343 has 4 divisors (see below), whose sum is σ = 25155128. Its totient is φ = 12577560.

The previous prime is 18866299. The next prime is 18866359. The reversal of 18866343 is 34366881.

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

It is not a de Polignac number, because 18866343 - 2⁹ = 18865831 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 (18866363) 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, 3144388 + ... + 3144393.

It is an arithmetic number, because the mean of its divisors is an integer number (6288782).

Almost surely, 2^18866343 is an apocalyptic number.

18866343 is a deficient number, since it is larger than the sum of its proper divisors (6288785).

18866343 is an equidigital number, since it uses as much as digits as its factorization.

18866343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6288784.

The product of its digits is 82944, while the sum is 39.

The square root of 18866343 is about 4343.5403762369. The cubic root of 18866343 is about 266.2129891908.

The spelling of 18866343 in words is "eighteen million, eight hundred sixty-six thousand, three hundred forty-three".