18424739 has 2 divisors, whose sum is σ = 18424740. Its totient is φ = 18424738.

The previous prime is 18424727. The next prime is 18424741. The reversal of 18424739 is 93742481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18424739 - 2¹² = 18420643 is a prime.

It is a Sophie Germain prime.

Together with 18424741, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18424709) 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 as a sum of consecutive naturals, namely, 9212369 + 9212370.

It is an arithmetic number, because the mean of its divisors is an integer number (9212370).

Almost surely, 2^18424739 is an apocalyptic number.

18424739 is a deficient number, since it is larger than the sum of its proper divisors (1).

18424739 is an equidigital number, since it uses as much as digits as its factorization.

18424739 is an odious number, because the sum of its binary digits is odd.

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

The square root of 18424739 is about 4292.4048038367. The cubic root of 18424739 is about 264.1194888776.

The spelling of 18424739 in words is "eighteen million, four hundred twenty-four thousand, seven hundred thirty-nine".