21302014423 has 2 divisors, whose sum is σ = 21302014424. Its totient is φ = 21302014422.

The previous prime is 21302014421. The next prime is 21302014427. The reversal of 21302014423 is 32441020312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302014423 - 2¹ = 21302014421 is a prime.

Together with 21302014421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21302014394 and 21302014403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302014421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651007211 + 10651007212.

It is an arithmetic number, because the mean of its divisors is an integer number (10651007212).

Almost surely, 2^21302014423 is an apocalyptic number.

21302014423 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302014423 is an equidigital number, since it uses as much as digits as its factorization.

21302014423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21302014423 its reverse (32441020312), we get a palindrome (53743034735).

The spelling of 21302014423 in words is "twenty-one billion, three hundred two million, fourteen thousand, four hundred twenty-three".