21433100243 has 8 divisors (see below), whose sum is σ = 21470904000. Its totient is φ = 21395320128.

The previous prime is 21433100207. The next prime is 21433100257. The reversal of 21433100243 is 34200133412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21433100243 - 2³⁰ = 20359358419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433100203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3267455 + ... + 3274007.

It is an arithmetic number, because the mean of its divisors is an integer number (2683863000).

Almost surely, 2^21433100243 is an apocalyptic number.

21433100243 is a deficient number, since it is larger than the sum of its proper divisors (37803757).

21433100243 is an equidigital number, since it uses as much as digits as its factorization.

21433100243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11821.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21433100243 its reverse (34200133412), we get a palindrome (55633233655).

The spelling of 21433100243 in words is "twenty-one billion, four hundred thirty-three million, one hundred thousand, two hundred forty-three".