20512541284 has 27 divisors (see below), whose sum is σ = 37895752377. Its totient is φ = 9713888928.

The previous prime is 20512541281. The next prime is 20512541317. The reversal of 20512541284 is 48214521502.

The square root of 20512541284 is 143222.

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

It can be written as a sum of positive squares in only one way, i.e., 16998422884 + 3514118400 = 130378^2 + 59280^2 .

It is not an unprimeable number, because it can be changed into a prime (20512541281) 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, 5440552 + ... + 5444320.

Almost surely, 2^20512541284 is an apocalyptic number.

20512541284 is the 143222-nd square number.

It is an amenable number.

20512541284 is a deficient number, since it is larger than the sum of its proper divisors (17383211093).

20512541284 is an frugal number, since it uses more digits than its factorization.

20512541284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580 (or 3790 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

Multiplying 20512541284 by its product of nonzero digits (25600), we get a square (525121056870400 = 22915520²).

The spelling of 20512541284 in words is "twenty billion, five hundred twelve million, five hundred forty-one thousand, two hundred eighty-four".