18395749 has 2 divisors, whose sum is σ = 18395750. Its totient is φ = 18395748.

The previous prime is 18395731. The next prime is 18395777. The reversal of 18395749 is 94759381.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15350724 + 3045025 = 3918^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 18395749 - 2¹¹ = 18393701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18395699 and 18395708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18395149) 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, 9197874 + 9197875.

It is an arithmetic number, because the mean of its divisors is an integer number (9197875).

Almost surely, 2^18395749 is an apocalyptic number.

It is an amenable number.

18395749 is a deficient number, since it is larger than the sum of its proper divisors (1).

18395749 is an equidigital number, since it uses as much as digits as its factorization.

18395749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 18395749 is about 4289.0265795399. The cubic root of 18395749 is about 263.9808918294.

The spelling of 18395749 in words is "eighteen million, three hundred ninety-five thousand, seven hundred forty-nine".