20611113203 has 2 divisors, whose sum is σ = 20611113204. Its totient is φ = 20611113202.

The previous prime is 20611113143. The next prime is 20611113209. The reversal of 20611113203 is 30231111602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20611113203 - 2⁸ = 20611112947 is a prime.

It is not a weakly prime, because it can be changed into another prime (20611113209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10305556601 + 10305556602.

It is an arithmetic number, because the mean of its divisors is an integer number (10305556602).

Almost surely, 2^20611113203 is an apocalyptic number.

20611113203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20611113203 is an equidigital number, since it uses as much as digits as its factorization.

20611113203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20611113203 its reverse (30231111602), we get a palindrome (50842224805).

The spelling of 20611113203 in words is "twenty billion, six hundred eleven million, one hundred thirteen thousand, two hundred three".