21432322243 has 2 divisors, whose sum is σ = 21432322244. Its totient is φ = 21432322242.

The previous prime is 21432322211. The next prime is 21432322271. The reversal of 21432322243 is 34222323412.

It is an a-pointer prime, because the next prime (21432322271) can be obtained adding 21432322243 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21432322243 - 2⁵ = 21432322211 is a prime.

It is not a weakly prime, because it can be changed into another prime (21432322273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716161121 + 10716161122.

It is an arithmetic number, because the mean of its divisors is an integer number (10716161122).

Almost surely, 2^21432322243 is an apocalyptic number.

21432322243 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432322243 is an equidigital number, since it uses as much as digits as its factorization.

21432322243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 28.

Adding to 21432322243 its reverse (34222323412), we get a palindrome (55654645655).

The spelling of 21432322243 in words is "twenty-one billion, four hundred thirty-two million, three hundred twenty-two thousand, two hundred forty-three".