18231443 has 2 divisors, whose sum is σ = 18231444. Its totient is φ = 18231442.

The previous prime is 18231419. The next prime is 18231457. The reversal of 18231443 is 34413281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18231443 - 2¹⁰ = 18230419 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18231403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9115721 + 9115722.

It is an arithmetic number, because the mean of its divisors is an integer number (9115722).

Almost surely, 2^18231443 is an apocalyptic number.

18231443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18231443 is an equidigital number, since it uses as much as digits as its factorization.

18231443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

The square root of 18231443 is about 4269.8293876922. The cubic root of 18231443 is about 263.1926042197.

The spelling of 18231443 in words is "eighteen million, two hundred thirty-one thousand, four hundred forty-three".