21100323330 has 48 divisors (see below), whose sum is σ = 58087953144. Its totient is φ = 5295767040.

The previous prime is 21100323319. The next prime is 21100323337. The reversal of 21100323330 is 3332300112.

21100323330 is a `hidden beast` number, since 2 + 1 + 10 + 0 + 323 + 330 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20440706841 + 659616489 = 142971^2 + 25683^2 .

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 (21100323337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6894001 + ... + 6897060.

Almost surely, 2^21100323330 is an apocalyptic number.

21100323330 is an abundant number, since it is smaller than the sum of its proper divisors (36987629814).

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

21100323330 is a wasteful number, since it uses less digits than its factorization.

21100323330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13791091 (or 13791088 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21100323330 its reverse (3332300112), we get a palindrome (24432623442).

The spelling of 21100323330 in words is "twenty-one billion, one hundred million, three hundred twenty-three thousand, three hundred thirty".