20559087529369 has 9 divisors (see below), whose sum is σ = 20634836610717. Its totient is φ = 20483615553984.

The previous prime is 20559087529339. The next prime is 20559087529417. The reversal of 20559087529369 is 96392578095502.

The square root of 20559087529369 is 4534213.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5582280409225 + 14976807120144 = 2362685^2 + 3869988^2 .

It is not a de Polignac number, because 20559087529369 - 2¹⁵ = 20559087496601 is a prime.

It is a super-2 number, since 2×20559087529369² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20559087529298 and 20559087529307.

It is not an unprimeable number, because it can be changed into a prime (20559087529339) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1255968817 + ... + 1255985185.

It is an arithmetic number, because the mean of its divisors is an integer number (2292759623413).

Almost surely, 2^{20559087529369} is an apocalyptic number.

20559087529369 is the 4534213-rd square number.

20559087529369 is the 2267107-th centered octagonal number.

It is an amenable number.

20559087529369 is a deficient number, since it is larger than the sum of its proper divisors (75749081348).

20559087529369 is an frugal number, since it uses more digits than its factorization.

20559087529369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33292 (or 16646 counting only the distinct ones).

The product of its (nonzero) digits is 367416000, while the sum is 70.

The spelling of 20559087529369 in words is "twenty trillion, five hundred fifty-nine billion, eighty-seven million, five hundred twenty-nine thousand, three hundred sixty-nine".