20451350203 has 2 divisors, whose sum is σ = 20451350204. Its totient is φ = 20451350202.

The previous prime is 20451350173. The next prime is 20451350221. The reversal of 20451350203 is 30205315402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20451350203 - 2³³ = 11861415611 is a prime.

It is not a weakly prime, because it can be changed into another prime (20451353203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10225675101 + 10225675102.

It is an arithmetic number, because the mean of its divisors is an integer number (10225675102).

Almost surely, 2^20451350203 is an apocalyptic number.

20451350203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20451350203 is an equidigital number, since it uses as much as digits as its factorization.

20451350203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20451350203 its reverse (30205315402), we get a palindrome (50656665605).

The spelling of 20451350203 in words is "twenty billion, four hundred fifty-one million, three hundred fifty thousand, two hundred three".