18983963 has 2 divisors, whose sum is σ = 18983964. Its totient is φ = 18983962.

The previous prime is 18983957. The next prime is 18983971. The reversal of 18983963 is 36938981.

It is a weak prime.

It is an emirp because it is prime and its reverse (36938981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18983963 - 2⁸ = 18983707 is a prime.

It is not a weakly prime, because it can be changed into another prime (18983863) 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, 9491981 + 9491982.

It is an arithmetic number, because the mean of its divisors is an integer number (9491982).

Almost surely, 2^18983963 is an apocalyptic number.

18983963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18983963 is an equidigital number, since it uses as much as digits as its factorization.

18983963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 18983963 is about 4357.0589851412. The cubic root of 18983963 is about 266.7650680252.

The spelling of 18983963 in words is "eighteen million, nine hundred eighty-three thousand, nine hundred sixty-three".