21476571444613 has 2 divisors, whose sum is σ = 21476571444614. Its totient is φ = 21476571444612.

The previous prime is 21476571444593. The next prime is 21476571444637. The reversal of 21476571444613 is 31644417567412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16343116046244 + 5133455398369 = 4042662^2 + 2265713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21476571444613 is a prime.

It is a super-2 number, since 2×21476571444613² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21476571447613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738285722306 + 10738285722307.

It is an arithmetic number, because the mean of its divisors is an integer number (10738285722307).

Almost surely, 2^{21476571444613} is an apocalyptic number.

It is an amenable number.

21476571444613 is a deficient number, since it is larger than the sum of its proper divisors (1).

21476571444613 is an equidigital number, since it uses as much as digits as its factorization.

21476571444613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 55.

The spelling of 21476571444613 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred seventy-one million, four hundred forty-four thousand, six hundred thirteen".