21432300233 has 2 divisors, whose sum is σ = 21432300234. Its totient is φ = 21432300232.

The previous prime is 21432300187. The next prime is 21432300301. The reversal of 21432300233 is 33200323412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14502903184 + 6929397049 = 120428^2 + 83243^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432300233 - 2²⁰ = 21431251657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21432300199 and 21432300208.

It is not a weakly prime, because it can be changed into another prime (21432330233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716150116 + 10716150117.

It is an arithmetic number, because the mean of its divisors is an integer number (10716150117).

Almost surely, 2^21432300233 is an apocalyptic number.

It is an amenable number.

21432300233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432300233 is an equidigital number, since it uses as much as digits as its factorization.

21432300233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21432300233 its reverse (33200323412), we get a palindrome (54632623645).

The spelling of 21432300233 in words is "twenty-one billion, four hundred thirty-two million, three hundred thousand, two hundred thirty-three".