21433020320233 has 4 divisors (see below), whose sum is σ = 21436539127888. Its totient is φ = 21429501512580.

The previous prime is 21433020320221. The next prime is 21433020320249. The reversal of 21433020320233 is 33202302033412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21433020320233 - 2⁹ = 21433020319721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433020320633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759394691 + ... + 1759406872.

It is an arithmetic number, because the mean of its divisors is an integer number (5359134781972).

Almost surely, 2^{21433020320233} is an apocalyptic number.

It is an amenable number.

21433020320233 is a deficient number, since it is larger than the sum of its proper divisors (3518807655).

21433020320233 is an equidigital number, since it uses as much as digits as its factorization.

21433020320233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518807654.

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 21433020320233 its reverse (33202302033412), we get a palindrome (54635322353645).

The spelling of 21433020320233 in words is "twenty-one trillion, four hundred thirty-three billion, twenty million, three hundred twenty thousand, two hundred thirty-three".