21233220334 has 16 divisors (see below), whose sum is σ = 31920762096. Its totient is φ = 10592985600.

The previous prime is 21233220329. The next prime is 21233220361. The reversal of 21233220334 is 43302233212.

It is a junction number, because it is equal to n+sod(n) for n = 21233220299 and 21233220308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529389 + ... + 3535399.

It is an arithmetic number, because the mean of its divisors is an integer number (1995047631).

Almost surely, 2^21233220334 is an apocalyptic number.

21233220334 is a deficient number, since it is larger than the sum of its proper divisors (10687541762).

21233220334 is a wasteful number, since it uses less digits than its factorization.

21233220334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651.

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

Adding to 21233220334 its reverse (43302233212), we get a palindrome (64535453546).

The spelling of 21233220334 in words is "twenty-one billion, two hundred thirty-three million, two hundred twenty thousand, three hundred thirty-four".