20360571528361 has 9 divisors (see below), whose sum is σ = 20397969997149. Its totient is φ = 20323241526924.

The previous prime is 20360571528337. The next prime is 20360571528383. The reversal of 20360571528361 is 16382517506302.

It is a happy number.

The square root of 20360571528361 is 4512269.

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

It is a de Polignac number, because none of the positive numbers 2^k-20360571528361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20360511528361) 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, 2648698060 + ... + 2648705746.

Almost surely, 2^{20360571528361} is an apocalyptic number.

20360571528361 is the 4512269-th square number.

20360571528361 is the 2256135-th centered octagonal number.

It is an amenable number.

20360571528361 is a deficient number, since it is larger than the sum of its proper divisors (37398468788).

20360571528361 is an frugal number, since it uses more digits than its factorization.

20360571528361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16548 (or 8274 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

Multiplying 20360571528361 by its sum of digits (49), we get a square (997668004889689 = 31585883²).

The spelling of 20360571528361 in words is "twenty trillion, three hundred sixty billion, five hundred seventy-one million, five hundred twenty-eight thousand, three hundred sixty-one".