18263963 has 2 divisors, whose sum is σ = 18263964. Its totient is φ = 18263962.

The previous prime is 18263951. The next prime is 18263989. The reversal of 18263963 is 36936281.

It is a weak prime.

It is an emirp because it is prime and its reverse (36936281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18263963 - 2¹⁰ = 18262939 is a prime.

It is not a weakly prime, because it can be changed into another prime (18263263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9131981 + 9131982.

It is an arithmetic number, because the mean of its divisors is an integer number (9131982).

Almost surely, 2^18263963 is an apocalyptic number.

18263963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18263963 is an equidigital number, since it uses as much as digits as its factorization.

18263963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 18263963 is about 4273.6358057280. The cubic root of 18263963 is about 263.3489995843.

The spelling of 18263963 in words is "eighteen million, two hundred sixty-three thousand, nine hundred sixty-three".