18199343 has 4 divisors (see below), whose sum is σ = 18403920. Its totient is φ = 17994768.

The previous prime is 18199331. The next prime is 18199361. The reversal of 18199343 is 34399181.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18199343 - 2¹⁰ = 18198319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18199297 and 18199306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18199243) 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, 102155 + ... + 102332.

It is an arithmetic number, because the mean of its divisors is an integer number (4600980).

Almost surely, 2^18199343 is an apocalyptic number.

18199343 is a deficient number, since it is larger than the sum of its proper divisors (204577).

18199343 is an equidigital number, since it uses as much as digits as its factorization.

18199343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204576.

The product of its digits is 23328, while the sum is 38.

The square root of 18199343 is about 4266.0687992577. The cubic root of 18199343 is about 263.0380462243.

The spelling of 18199343 in words is "eighteen million, one hundred ninety-nine thousand, three hundred forty-three".