18247943 has 8 divisors (see below), whose sum is σ = 21280800. Its totient is φ = 15640800.

The previous prime is 18247927. The next prime is 18247963. The reversal of 18247943 is 34974281.

It is not a de Polignac number, because 18247943 - 2⁴ = 18247927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18247897 and 18247906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18247903) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 26258 + ... + 26943.

It is an arithmetic number, because the mean of its divisors is an integer number (2660100).

Almost surely, 2^18247943 is an apocalyptic number.

18247943 is a deficient number, since it is larger than the sum of its proper divisors (3032857).

18247943 is an frugal number, since it uses more digits than its factorization.

18247943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53222 (or 53208 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 18247943 is about 4271.7611122346. The cubic root of 18247943 is about 263.2719793326.

The spelling of 18247943 in words is "eighteen million, two hundred forty-seven thousand, nine hundred forty-three".