21332322330 has 128 divisors (see below), whose sum is σ = 61045456896. Its totient is φ = 4710220800.

The previous prime is 21332322329. The next prime is 21332322331. The reversal of 21332322330 is 3322323312.

It is an interprime number because it is at equal distance from previous prime (21332322329) and next prime (21332322331).

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 21332322330.

It is not an unprimeable number, because it can be changed into a prime (21332322331) 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, 112579 + ... + 235241.

It is an arithmetic number, because the mean of its divisors is an integer number (476917632).

Almost surely, 2^21332322330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21332322330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30522728448).

21332322330 is an abundant number, since it is smaller than the sum of its proper divisors (39713134566).

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

21332322330 is a wasteful number, since it uses less digits than its factorization.

21332322330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122732.

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 21332322330 its reverse (3322323312), we get a palindrome (24654645642).

The spelling of 21332322330 in words is "twenty-one billion, three hundred thirty-two million, three hundred twenty-two thousand, three hundred thirty".