18680803 has 2 divisors, whose sum is σ = 18680804. Its totient is φ = 18680802.

The previous prime is 18680797. The next prime is 18680861. The reversal of 18680803 is 30808681.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18680803 is a prime.

It is not a weakly prime, because it can be changed into another prime (18680003) 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, 9340401 + 9340402.

It is an arithmetic number, because the mean of its divisors is an integer number (9340402).

Almost surely, 2^18680803 is an apocalyptic number.

18680803 is a deficient number, since it is larger than the sum of its proper divisors (1).

18680803 is an equidigital number, since it uses as much as digits as its factorization.

18680803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 18680803 is about 4322.1294520178. The cubic root of 18680803 is about 265.3374270571.

The spelling of 18680803 in words is "eighteen million, six hundred eighty thousand, eight hundred three".