20430343727 has 2 divisors, whose sum is σ = 20430343728. Its totient is φ = 20430343726.

The previous prime is 20430343723. The next prime is 20430343729. The reversal of 20430343727 is 72734303402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20430343727 - 2² = 20430343723 is a prime.

Together with 20430343729, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20430343721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215171863 + 10215171864.

It is an arithmetic number, because the mean of its divisors is an integer number (10215171864).

Almost surely, 2^20430343727 is an apocalyptic number.

20430343727 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430343727 is an equidigital number, since it uses as much as digits as its factorization.

20430343727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 35.

The spelling of 20430343727 in words is "twenty billion, four hundred thirty million, three hundred forty-three thousand, seven hundred twenty-seven".