21330140340313 has 6 divisors (see below), whose sum is σ = 24812612232666. Its totient is φ = 18282977434512.

The previous prime is 21330140340251. The next prime is 21330140340317. The reversal of 21330140340313 is 31304304103312.

It can be written as a sum of positive squares in only one way, i.e., 21008683091529 + 321457248784 = 4583523^2 + 566972^2 .

It is not a de Polignac number, because 21330140340313 - 2¹³ = 21330140332121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330140340317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217654493220 + ... + 217654493317.

It is an arithmetic number, because the mean of its divisors is an integer number (4135435372111).

Almost surely, 2^{21330140340313} is an apocalyptic number.

It is an amenable number.

21330140340313 is a deficient number, since it is larger than the sum of its proper divisors (3482471892353).

21330140340313 is an equidigital number, since it uses as much as digits as its factorization.

21330140340313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435308986551 (or 435308986544 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21330140340313 its reverse (31304304103312), we get a palindrome (52634444443625).

The spelling of 21330140340313 in words is "twenty-one trillion, three hundred thirty billion, one hundred forty million, three hundred forty thousand, three hundred thirteen".