18287963 has 4 divisors (see below), whose sum is σ = 18298080. Its totient is φ = 18277848.

The previous prime is 18287957. The next prime is 18287989. The reversal of 18287963 is 36978281.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18287963 - 2¹⁶ = 18222427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18287933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523 + ... + 6236.

It is an arithmetic number, because the mean of its divisors is an integer number (4574520).

Almost surely, 2^18287963 is an apocalyptic number.

18287963 is a deficient number, since it is larger than the sum of its proper divisors (10117).

18287963 is an equidigital number, since it uses as much as digits as its factorization.

18287963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10116.

The product of its digits is 145152, while the sum is 44.

The square root of 18287963 is about 4276.4427974661. The cubic root of 18287963 is about 263.4643014960.

The spelling of 18287963 in words is "eighteen million, two hundred eighty-seven thousand, nine hundred sixty-three".