18429443 has 2 divisors, whose sum is σ = 18429444. Its totient is φ = 18429442.

The previous prime is 18429431. The next prime is 18429457. The reversal of 18429443 is 34492481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18429443 - 2⁴ = 18429427 is a prime.

It is not a weakly prime, because it can be changed into another prime (18429493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9214721 + 9214722.

It is an arithmetic number, because the mean of its divisors is an integer number (9214722).

Almost surely, 2^18429443 is an apocalyptic number.

18429443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18429443 is an equidigital number, since it uses as much as digits as its factorization.

18429443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 18429443 is about 4292.9527134596. The cubic root of 18429443 is about 264.1419643178.

The spelling of 18429443 in words is "eighteen million, four hundred twenty-nine thousand, four hundred forty-three".