21476575307513 has 4 divisors (see below), whose sum is σ = 21503122372980. Its totient is φ = 21450028242048.

The previous prime is 21476575307449. The next prime is 21476575307519. The reversal of 21476575307513 is 31570357567412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9547308976384 + 11929266331129 = 3089872^2 + 3453877^2 .

It is a cyclic number.

It is not a de Polignac number, because 21476575307513 - 2⁶ = 21476575307449 is a prime.

It is a super-2 number, since 2×21476575307513² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21476575307519) 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 3 ways as a sum of consecutive naturals, for example, 13273531520 + ... + 13273533137.

It is an arithmetic number, because the mean of its divisors is an integer number (5375780593245).

Almost surely, 2^{21476575307513} is an apocalyptic number.

It is an amenable number.

21476575307513 is a deficient number, since it is larger than the sum of its proper divisors (26547065467).

21476575307513 is an equidigital number, since it uses as much as digits as its factorization.

21476575307513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26547065466.

The product of its (nonzero) digits is 18522000, while the sum is 56.

The spelling of 21476575307513 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred seventy-five million, three hundred seven thousand, five hundred thirteen".