18166763 has 2 divisors, whose sum is σ = 18166764. Its totient is φ = 18166762.

The previous prime is 18166751. The next prime is 18166783. The reversal of 18166763 is 36766181.

It is a weak prime.

It is an emirp because it is prime and its reverse (36766181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18166763 - 2⁴ = 18166747 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18166783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9083381 + 9083382.

It is an arithmetic number, because the mean of its divisors is an integer number (9083382).

Almost surely, 2^18166763 is an apocalyptic number.

18166763 is a deficient number, since it is larger than the sum of its proper divisors (1).

18166763 is an equidigital number, since it uses as much as digits as its factorization.

18166763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 18166763 is about 4262.2485849608. The cubic root of 18166763 is about 262.8809911328.

The spelling of 18166763 in words is "eighteen million, one hundred sixty-six thousand, seven hundred sixty-three".