21323023330 has 128 divisors (see below), whose sum is σ = 47276835840. Its totient is φ = 6758277120.

The previous prime is 21323023297. The next prime is 21323023339. The reversal of 21323023330 is 3332032312.

It is not an unprimeable number, because it can be changed into a prime (21323023339) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33792115 + ... + 33792745.

It is an arithmetic number, because the mean of its divisors is an integer number (369350280).

Almost surely, 2^21323023330 is an apocalyptic number.

21323023330 is an abundant number, since it is smaller than the sum of its proper divisors (25953812510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323023330 is a wasteful number, since it uses less digits than its factorization.

21323023330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124.

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

Adding to 21323023330 its reverse (3332032312), we get a palindrome (24655055642).

The spelling of 21323023330 in words is "twenty-one billion, three hundred twenty-three million, twenty-three thousand, three hundred thirty".