18234443 has 2 divisors, whose sum is σ = 18234444. Its totient is φ = 18234442.

The previous prime is 18234431. The next prime is 18234457. The reversal of 18234443 is 34443281.

It is a weak prime.

It is an emirp because it is prime and its reverse (34443281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18234443 - 2⁴ = 18234427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18234473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9117221 + 9117222.

It is an arithmetic number, because the mean of its divisors is an integer number (9117222).

Almost surely, 2^18234443 is an apocalyptic number.

18234443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18234443 is an equidigital number, since it uses as much as digits as its factorization.

18234443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 29.

The square root of 18234443 is about 4270.1806753345. The cubic root of 18234443 is about 263.2070396195.

It can be divided in two parts, 182 and 34443, that multiplied together give a palindrome (6268626).

The spelling of 18234443 in words is "eighteen million, two hundred thirty-four thousand, four hundred forty-three".