21432233443 has 2 divisors, whose sum is σ = 21432233444. Its totient is φ = 21432233442.

The previous prime is 21432233393. The next prime is 21432233467. The reversal of 21432233443 is 34433223412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21432233443 - 2¹³ = 21432225251 is a prime.

It is not a weakly prime, because it can be changed into another prime (21432233143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716116721 + 10716116722.

It is an arithmetic number, because the mean of its divisors is an integer number (10716116722).

Almost surely, 2^21432233443 is an apocalyptic number.

21432233443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432233443 is an equidigital number, since it uses as much as digits as its factorization.

21432233443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 31.

Adding to 21432233443 its reverse (34433223412), we get a palindrome (55865456855).

The spelling of 21432233443 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-three thousand, four hundred forty-three".