20451234203 has 2 divisors, whose sum is σ = 20451234204. Its totient is φ = 20451234202.

The previous prime is 20451234173. The next prime is 20451234211. The reversal of 20451234203 is 30243215402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20451234203 - 2²⁶ = 20384125339 is a prime.

It is not a weakly prime, because it can be changed into another prime (20451234283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10225617101 + 10225617102.

It is an arithmetic number, because the mean of its divisors is an integer number (10225617102).

Almost surely, 2^20451234203 is an apocalyptic number.

20451234203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20451234203 is an equidigital number, since it uses as much as digits as its factorization.

20451234203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20451234203 its reverse (30243215402), we get a palindrome (50694449605).

The spelling of 20451234203 in words is "twenty billion, four hundred fifty-one million, two hundred thirty-four thousand, two hundred three".