21303203140313 has 8 divisors (see below), whose sum is σ = 22556452906440. Its totient is φ = 20049966726400.

The previous prime is 21303203140291. The next prime is 21303203140361. The reversal of 21303203140313 is 31304130230312.

It can be written as a sum of positive squares in 4 ways, for example, as 5506099794064 + 15797103346249 = 2346508^2 + 3974557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21303203140313 - 2⁸ = 21303203140057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303203110313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44723 + ... + 6527511.

It is an arithmetic number, because the mean of its divisors is an integer number (2819556613305).

Almost surely, 2^{21303203140313} is an apocalyptic number.

It is an amenable number.

21303203140313 is a deficient number, since it is larger than the sum of its proper divisors (1253249766127).

21303203140313 is a wasteful number, since it uses less digits than its factorization.

21303203140313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676107.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21303203140313 its reverse (31304130230312), we get a palindrome (52607333370625).

The spelling of 21303203140313 in words is "twenty-one trillion, three hundred three billion, two hundred three million, one hundred forty thousand, three hundred thirteen".