18748963 has 2 divisors, whose sum is σ = 18748964. Its totient is φ = 18748962.

The previous prime is 18748957. The next prime is 18748967. The reversal of 18748963 is 36984781.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18748963 is a prime.

It is a super-2 number, since 2×18748963² = 703047227150738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18748967) 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, 9374481 + 9374482.

It is an arithmetic number, because the mean of its divisors is an integer number (9374482).

Almost surely, 2^18748963 is an apocalyptic number.

18748963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18748963 is an equidigital number, since it uses as much as digits as its factorization.

18748963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 18748963 is about 4330.0072748207. The cubic root of 18748963 is about 265.6597445301.

The spelling of 18748963 in words is "eighteen million, seven hundred forty-eight thousand, nine hundred sixty-three".