18016793 has 2 divisors, whose sum is σ = 18016794. Its totient is φ = 18016792.

The previous prime is 18016783. The next prime is 18016799. The reversal of 18016793 is 39761081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11478544 + 6538249 = 3388^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 18016793 - 2⁶ = 18016729 is a prime.

It is not a weakly prime, because it can be changed into another prime (18016799) 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, 9008396 + 9008397.

It is an arithmetic number, because the mean of its divisors is an integer number (9008397).

Almost surely, 2^18016793 is an apocalyptic number.

It is an amenable number.

18016793 is a deficient number, since it is larger than the sum of its proper divisors (1).

18016793 is an equidigital number, since it uses as much as digits as its factorization.

18016793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 18016793 is about 4244.6192997724. The cubic root of 18016793 is about 262.1556142931.

The spelling of 18016793 in words is "eighteen million, sixteen thousand, seven hundred ninety-three".