21476516356073 has 2 divisors, whose sum is σ = 21476516356074. Its totient is φ = 21476516356072.

The previous prime is 21476516356039. The next prime is 21476516356081. The reversal of 21476516356073 is 37065361567412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16343196899584 + 5133319456489 = 4042672^2 + 2265683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21476516356073 is a prime.

It is a super-2 number, since 2×21476516356073² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21476516346073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738258178036 + 10738258178037.

It is an arithmetic number, because the mean of its divisors is an integer number (10738258178037).

Almost surely, 2^{21476516356073} is an apocalyptic number.

It is an amenable number.

21476516356073 is a deficient number, since it is larger than the sum of its proper divisors (1).

21476516356073 is an equidigital number, since it uses as much as digits as its factorization.

21476516356073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19051200, while the sum is 56.

The spelling of 21476516356073 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred sixteen million, three hundred fifty-six thousand, seventy-three".