21320113230 has 96 divisors (see below), whose sum is σ = 60287703840. Its totient is φ = 5196038400.

The previous prime is 21320113207. The next prime is 21320113289. The reversal of 21320113230 is 3231102312.

21320113230 is a `hidden beast` number, since 2 + 1 + 320 + 113 + 230 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27961 + ... + 208379.

It is an arithmetic number, because the mean of its divisors is an integer number (627996915).

Almost surely, 2^21320113230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21320113230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30143851920).

21320113230 is an abundant number, since it is smaller than the sum of its proper divisors (38967590610).

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

21320113230 is a wasteful number, since it uses less digits than its factorization.

21320113230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180546 (or 180543 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21320113230 its reverse (3231102312), we get a palindrome (24551215542).

The spelling of 21320113230 in words is "twenty-one billion, three hundred twenty million, one hundred thirteen thousand, two hundred thirty".