18007963 has 2 divisors, whose sum is σ = 18007964. Its totient is φ = 18007962.

The previous prime is 18007939. The next prime is 18007973. The reversal of 18007963 is 36970081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18007963 - 2¹³ = 17999771 is a prime.

It is not a weakly prime, because it can be changed into another prime (18007973) 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 as a sum of consecutive naturals, namely, 9003981 + 9003982.

It is an arithmetic number, because the mean of its divisors is an integer number (9003982).

Almost surely, 2^18007963 is an apocalyptic number.

18007963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18007963 is an equidigital number, since it uses as much as digits as its factorization.

18007963 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 34.

The square root of 18007963 is about 4243.5790319022. The cubic root of 18007963 is about 262.1127799525.

The spelling of 18007963 in words is "eighteen million, seven thousand, nine hundred sixty-three".