21452355167273 has 2 divisors, whose sum is σ = 21452355167274. Its totient is φ = 21452355167272.

The previous prime is 21452355167249. The next prime is 21452355167377. The reversal of 21452355167273 is 37276155325412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17876220768784 + 3576134398489 = 4228028^2 + 1891067^2 .

It is a cyclic number.

It is not a de Polignac number, because 21452355167273 - 2¹⁸ = 21452354905129 is a prime.

It is not a weakly prime, because it can be changed into another prime (21452555167273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10726177583636 + 10726177583637.

It is an arithmetic number, because the mean of its divisors is an integer number (10726177583637).

Almost surely, 2^{21452355167273} is an apocalyptic number.

It is an amenable number.

21452355167273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21452355167273 is an equidigital number, since it uses as much as digits as its factorization.

21452355167273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584000, while the sum is 53.

The spelling of 21452355167273 in words is "twenty-one trillion, four hundred fifty-two billion, three hundred fifty-five million, one hundred sixty-seven thousand, two hundred seventy-three".