21432233393 has 2 divisors, whose sum is σ = 21432233394. Its totient is φ = 21432233392.

The previous prime is 21432233371. The next prime is 21432233443. The reversal of 21432233393 is 39333223412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16965583504 + 4466649889 = 130252^2 + 66833^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432233393 - 2¹⁰ = 21432232369 is a prime.

It is not a weakly prime, because it can be changed into another prime (21432283393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716116696 + 10716116697.

It is an arithmetic number, because the mean of its divisors is an integer number (10716116697).

Almost surely, 2^21432233393 is an apocalyptic number.

It is an amenable number.

21432233393 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432233393 is an equidigital number, since it uses as much as digits as its factorization.

21432233393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 35.

The spelling of 21432233393 in words is "twenty-one billion, four hundred thirty-two million, two hundred thirty-three thousand, three hundred ninety-three".