21300332233 has 4 divisors (see below), whose sum is σ = 21702225348. Its totient is φ = 20898439120.

The previous prime is 21300332227. The next prime is 21300332303. The reversal of 21300332233 is 33223300312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9827351689 + 11472980544 = 99133^2 + 107112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21300332233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300332533) 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, 200946478 + ... + 200946583.

It is an arithmetic number, because the mean of its divisors is an integer number (5425556337).

Almost surely, 2^21300332233 is an apocalyptic number.

It is an amenable number.

21300332233 is a deficient number, since it is larger than the sum of its proper divisors (401893115).

21300332233 is an equidigital number, since it uses as much as digits as its factorization.

21300332233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401893114.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 21300332233 its reverse (33223300312), we get a palindrome (54523632545).

The spelling of 21300332233 in words is "twenty-one billion, three hundred million, three hundred thirty-two thousand, two hundred thirty-three".