21342233203 has 4 divisors (see below), whose sum is σ = 21342531400. Its totient is φ = 21341935008.

The previous prime is 21342233191. The next prime is 21342233261. The reversal of 21342233203 is 30233224312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21342233203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342233293) 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, 29851 + ... + 208747.

It is an arithmetic number, because the mean of its divisors is an integer number (5335632850).

Almost surely, 2^21342233203 is an apocalyptic number.

21342233203 is a deficient number, since it is larger than the sum of its proper divisors (298197).

21342233203 is a wasteful number, since it uses less digits than its factorization.

21342233203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298196.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21342233203 its reverse (30233224312), we get a palindrome (51575457515).

The spelling of 21342233203 in words is "twenty-one billion, three hundred forty-two million, two hundred thirty-three thousand, two hundred three".