21022230330 has 48 divisors (see below), whose sum is σ = 54669611880. Its totient is φ = 5604716544.

The previous prime is 21022230329. The next prime is 21022230337. The reversal of 21022230330 is 3303222012.

It is a happy number.

21022230330 is a `hidden beast` number, since 2 + 102 + 2 + 230 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18490832361 + 2531397969 = 135981^2 + 50313^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21022230337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 441106 + ... + 486434.

Almost surely, 2^21022230330 is an apocalyptic number.

21022230330 is an abundant number, since it is smaller than the sum of its proper divisors (33647381550).

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

21022230330 is a wasteful number, since it uses less digits than its factorization.

21022230330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50495 (or 50492 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21022230330 its reverse (3303222012), we get a palindrome (24325452342).

The spelling of 21022230330 in words is "twenty-one billion, twenty-two million, two hundred thirty thousand, three hundred thirty".