21592147322173 has 16 divisors (see below), whose sum is σ = 22961017038960. Its totient is φ = 20234253828096.

The previous prime is 21592147322159. The next prime is 21592147322209. The reversal of 21592147322173 is 37122374129512.

It can be written as a sum of positive squares in 8 ways, for example, as 32348900164 + 21559798422009 = 179858^2 + 4643253^2 .

It is a cyclic number.

It is not a de Polignac number, because 21592147322173 - 2²⁹ = 21591610451261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21592147322143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287439943 + ... + 287515051.

It is an arithmetic number, because the mean of its divisors is an integer number (1435063564935).

Almost surely, 2^{21592147322173} is an apocalyptic number.

It is an amenable number.

21592147322173 is a deficient number, since it is larger than the sum of its proper divisors (1368869716787).

21592147322173 is a wasteful number, since it uses less digits than its factorization.

21592147322173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147936.

The product of its digits is 1270080, while the sum is 49.

The spelling of 21592147322173 in words is "twenty-one trillion, five hundred ninety-two billion, one hundred forty-seven million, three hundred twenty-two thousand, one hundred seventy-three".