18669743 has 2 divisors, whose sum is σ = 18669744. Its totient is φ = 18669742.

The previous prime is 18669737. The next prime is 18669773. The reversal of 18669743 is 34796681.

It is a weak prime.

It is an emirp because it is prime and its reverse (34796681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18669743 - 2¹⁴ = 18653359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18669694 and 18669703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18669713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334871 + 9334872.

It is an arithmetic number, because the mean of its divisors is an integer number (9334872).

Almost surely, 2^18669743 is an apocalyptic number.

18669743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18669743 is an equidigital number, since it uses as much as digits as its factorization.

18669743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 18669743 is about 4320.8498006758. The cubic root of 18669743 is about 265.2850522335.

The spelling of 18669743 in words is "eighteen million, six hundred sixty-nine thousand, seven hundred forty-three".