18869743 has 2 divisors, whose sum is σ = 18869744. Its totient is φ = 18869742.

The previous prime is 18869737. The next prime is 18869759. The reversal of 18869743 is 34796881.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18869743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18869693 and 18869702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18869713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9434871 + 9434872.

It is an arithmetic number, because the mean of its divisors is an integer number (9434872).

Almost surely, 2^18869743 is an apocalyptic number.

18869743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18869743 is an equidigital number, since it uses as much as digits as its factorization.

18869743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 18869743 is about 4343.9317443993. The cubic root of 18869743 is about 266.2289800976.

The spelling of 18869743 in words is "eighteen million, eight hundred sixty-nine thousand, seven hundred forty-three".