20566215930001 has 15 divisors (see below), whose sum is σ = 23992750208553. Its totient is φ = 17627994612900.

The previous prime is 20566215929993. The next prime is 20566215930079. The reversal of 20566215930001 is 10003951266502.

The square root of 20566215930001 is 4534999.

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

It is not a de Polignac number, because 20566215930001 - 2³ = 20566215929993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20566215933001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 222168676 + ... + 222261226.

Almost surely, 2^{20566215930001} is an apocalyptic number.

20566215930001 is the 4534999-th square number.

20566215930001 is the 2267500-th centered octagonal number.

It is an amenable number.

20566215930001 is a deficient number, since it is larger than the sum of its proper divisors (3426534278552).

20566215930001 is an frugal number, since it uses more digits than its factorization.

20566215930001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185130 (or 92558 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 20566215930001 in words is "twenty trillion, five hundred sixty-six billion, two hundred fifteen million, nine hundred thirty thousand, one".