21433330343 has 4 divisors (see below), whose sum is σ = 22124728128. Its totient is φ = 20741932560.

The previous prime is 21433330337. The next prime is 21433330381. The reversal of 21433330343 is 34303333412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21433330343 - 2⁶ = 21433330279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433330313) 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, 345698846 + ... + 345698907.

It is an arithmetic number, because the mean of its divisors is an integer number (5531182032).

Almost surely, 2^21433330343 is an apocalyptic number.

21433330343 is a deficient number, since it is larger than the sum of its proper divisors (691397785).

21433330343 is an equidigital number, since it uses as much as digits as its factorization.

21433330343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691397784.

The product of its (nonzero) digits is 23328, while the sum is 29.

Adding to 21433330343 its reverse (34303333412), we get a palindrome (55736663755).

The spelling of 21433330343 in words is "twenty-one billion, four hundred thirty-three million, three hundred thirty thousand, three hundred forty-three".