21342255233 has 32 divisors (see below), whose sum is σ = 24109456896. Its totient is φ = 18760405248.

The previous prime is 21342255223. The next prime is 21342255271. The reversal of 21342255233 is 33255224312.

It is not a de Polignac number, because 21342255233 - 2⁴ = 21342255217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21342255233.

It is not an unprimeable number, because it can be changed into a prime (21342255223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14351816 + ... + 14353302.

It is an arithmetic number, because the mean of its divisors is an integer number (753420528).

Almost surely, 2^21342255233 is an apocalyptic number.

It is an amenable number.

21342255233 is a deficient number, since it is larger than the sum of its proper divisors (2767201663).

21342255233 is a wasteful number, since it uses less digits than its factorization.

21342255233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153.

The product of its digits is 43200, while the sum is 32.

Adding to 21342255233 its reverse (33255224312), we get a palindrome (54597479545).

The spelling of 21342255233 in words is "twenty-one billion, three hundred forty-two million, two hundred fifty-five thousand, two hundred thirty-three".