20541530573 has 2 divisors, whose sum is σ = 20541530574. Its totient is φ = 20541530572.

The previous prime is 20541530563. The next prime is 20541530579. The reversal of 20541530573 is 37503514502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17191667689 + 3349862884 = 131117^2 + 57878^2 .

It is a cyclic number.

It is not a de Polignac number, because 20541530573 - 2¹² = 20541526477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20541530579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10270765286 + 10270765287.

It is an arithmetic number, because the mean of its divisors is an integer number (10270765287).

Almost surely, 2^20541530573 is an apocalyptic number.

It is an amenable number.

20541530573 is a deficient number, since it is larger than the sum of its proper divisors (1).

20541530573 is an equidigital number, since it uses as much as digits as its factorization.

20541530573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63000, while the sum is 35.

The spelling of 20541530573 in words is "twenty billion, five hundred forty-one million, five hundred thirty thousand, five hundred seventy-three".