18812203 has 2 divisors, whose sum is σ = 18812204. Its totient is φ = 18812202.

The previous prime is 18812177. The next prime is 18812221. The reversal of 18812203 is 30221881.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18812203 is a prime.

It is not a weakly prime, because it can be changed into another prime (18812263) 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, 9406101 + 9406102.

It is an arithmetic number, because the mean of its divisors is an integer number (9406102).

Almost surely, 2^18812203 is an apocalyptic number.

18812203 is a deficient number, since it is larger than the sum of its proper divisors (1).

18812203 is an equidigital number, since it uses as much as digits as its factorization.

18812203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18812203 is about 4337.3036554984. The cubic root of 18812203 is about 265.9580982483.

The spelling of 18812203 in words is "eighteen million, eight hundred twelve thousand, two hundred three".