18803663 has 2 divisors, whose sum is σ = 18803664. Its totient is φ = 18803662.

The previous prime is 18803657. The next prime is 18803669. The reversal of 18803663 is 36630881.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (18803657) and next prime (18803669).

It is a cyclic number.

It is not a de Polignac number, because 18803663 - 2⁴ = 18803647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18803669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401831 + 9401832.

It is an arithmetic number, because the mean of its divisors is an integer number (9401832).

Almost surely, 2^18803663 is an apocalyptic number.

18803663 is a deficient number, since it is larger than the sum of its proper divisors (1).

18803663 is an equidigital number, since it uses as much as digits as its factorization.

18803663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 18803663 is about 4336.3190611393. The cubic root of 18803663 is about 265.9178473194.

The spelling of 18803663 in words is "eighteen million, eight hundred three thousand, six hundred sixty-three".