21302113320 has 128 divisors (see below), whose sum is σ = 74094393600. Its totient is φ = 5433576192.

The previous prime is 21302113309. The next prime is 21302113331. The reversal of 21302113320 is 2331120312.

21302113320 is a `hidden beast` number, since 2 + 130 + 211 + 3 + 320 = 666.

It is an interprime number because it is at equal distance from previous prime (21302113309) and next prime (21302113331).

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

It is a junction number, because it is equal to n+sod(n) for n = 21302113293 and 21302113302.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 403947 + ... + 453626.

It is an arithmetic number, because the mean of its divisors is an integer number (578862450).

Almost surely, 2^21302113320 is an apocalyptic number.

21302113320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302113320 is an abundant number, since it is smaller than the sum of its proper divisors (52792280280).

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

21302113320 is a wasteful number, since it uses less digits than its factorization.

21302113320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857616 (or 857606 counting only the distinct ones).

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

Adding to 21302113320 its reverse (2331120312), we get a palindrome (23633233632).

The spelling of 21302113320 in words is "twenty-one billion, three hundred two million, one hundred thirteen thousand, three hundred twenty".