20503512203 has 2 divisors, whose sum is σ = 20503512204. Its totient is φ = 20503512202.

The previous prime is 20503512187. The next prime is 20503512209. The reversal of 20503512203 is 30221530502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20503512203 - 2⁴ = 20503512187 is a prime.

It is not a weakly prime, because it can be changed into another prime (20503512209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251756101 + 10251756102.

It is an arithmetic number, because the mean of its divisors is an integer number (10251756102).

Almost surely, 2^20503512203 is an apocalyptic number.

20503512203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20503512203 is an equidigital number, since it uses as much as digits as its factorization.

20503512203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The spelling of 20503512203 in words is "twenty billion, five hundred three million, five hundred twelve thousand, two hundred three".