20318203 has 2 divisors, whose sum is σ = 20318204. Its totient is φ = 20318202.

The previous prime is 20318197. The next prime is 20318251. The reversal of 20318203 is 30281302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20318203 - 2⁹ = 20317691 is a prime.

It is not a weakly prime, because it can be changed into another prime (20318293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10159101 + 10159102.

It is an arithmetic number, because the mean of its divisors is an integer number (10159102).

Almost surely, 2^20318203 is an apocalyptic number.

20318203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20318203 is an equidigital number, since it uses as much as digits as its factorization.

20318203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20318203 is about 4507.5717409710. The cubic root of 20318203 is about 272.8737536112.

Adding to 20318203 its reverse (30281302), we get a palindrome (50599505).

The spelling of 20318203 in words is "twenty million, three hundred eighteen thousand, two hundred three".