21476522453329 has 2 divisors, whose sum is σ = 21476522453330. Its totient is φ = 21476522453328.

The previous prime is 21476522453317. The next prime is 21476522453357. The reversal of 21476522453329 is 92335422567412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21355045807104 + 121476646225 = 4621152^2 + 348535^2 .

It is a cyclic number.

It is not a de Polignac number, because 21476522453329 - 2¹⁷ = 21476522322257 is a prime.

It is a super-2 number, since 2×21476522453329² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21476522453329.

It is not a weakly prime, because it can be changed into another prime (21476522453129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738261226664 + 10738261226665.

It is an arithmetic number, because the mean of its divisors is an integer number (10738261226665).

Almost surely, 2^{21476522453329} is an apocalyptic number.

It is an amenable number.

21476522453329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21476522453329 is an equidigital number, since it uses as much as digits as its factorization.

21476522453329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 55.

The spelling of 21476522453329 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred twenty-two million, four hundred fifty-three thousand, three hundred twenty-nine".