21200232313 has 32 divisors (see below), whose sum is σ = 25267334400. Its totient is φ = 17587992576.

The previous prime is 21200232307. The next prime is 21200232349. The reversal of 21200232313 is 31323200212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200232313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200232013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3346533 + ... + 3352861.

It is an arithmetic number, because the mean of its divisors is an integer number (789604200).

Almost surely, 2^21200232313 is an apocalyptic number.

21200232313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21200232313 is a deficient number, since it is larger than the sum of its proper divisors (4067102087).

21200232313 is a wasteful number, since it uses less digits than its factorization.

21200232313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7041.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21200232313 its reverse (31323200212), we get a palindrome (52523432525).

The spelling of 21200232313 in words is "twenty-one billion, two hundred million, two hundred thirty-two thousand, three hundred thirteen".