21323212330 has 16 divisors (see below), whose sum is σ = 43864894080. Its totient is φ = 7310815632.

The previous prime is 21323212291. The next prime is 21323212363. The reversal of 21323212330 is 3321232312.

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, 152308590 + ... + 152308729.

It is an arithmetic number, because the mean of its divisors is an integer number (2741555880).

Almost surely, 2^21323212330 is an apocalyptic number.

21323212330 is an abundant number, since it is smaller than the sum of its proper divisors (22541681750).

21323212330 is a wasteful number, since it uses less digits than its factorization.

21323212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304617333.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21323212330 its reverse (3321232312), we get a palindrome (24644444642).

The spelling of 21323212330 in words is "twenty-one billion, three hundred twenty-three million, two hundred twelve thousand, three hundred thirty".