20430312271 has 2 divisors, whose sum is σ = 20430312272. Its totient is φ = 20430312270.

The previous prime is 20430312251. The next prime is 20430312307. The reversal of 20430312271 is 17221303402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20430312271 - 2⁵ = 20430312239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20430312251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215156135 + 10215156136.

It is an arithmetic number, because the mean of its divisors is an integer number (10215156136).

Almost surely, 2^20430312271 is an apocalyptic number.

20430312271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430312271 is an equidigital number, since it uses as much as digits as its factorization.

20430312271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 20430312271 its reverse (17221303402), we get a palindrome (37651615673).

The spelling of 20430312271 in words is "twenty billion, four hundred thirty million, three hundred twelve thousand, two hundred seventy-one".