20681203 has 2 divisors, whose sum is σ = 20681204. Its totient is φ = 20681202.

The previous prime is 20681201. The next prime is 20681207. The reversal of 20681203 is 30218602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20681203 - 2¹ = 20681201 is a prime.

Together with 20681201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20681201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10340601 + 10340602.

It is an arithmetic number, because the mean of its divisors is an integer number (10340602).

Almost surely, 2^20681203 is an apocalyptic number.

20681203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20681203 is an equidigital number, since it uses as much as digits as its factorization.

20681203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20681203 is about 4547.6590681360. The cubic root of 20681203 is about 274.4892027741.

Adding to 20681203 its reverse (30218602), we get a palindrome (50899805).

The spelling of 20681203 in words is "twenty million, six hundred eighty-one thousand, two hundred three".