20530541 has 2 divisors, whose sum is σ = 20530542. Its totient is φ = 20530540.

The previous prime is 20530529. The next prime is 20530553. The reversal of 20530541 is 14503502.

It is a balanced prime because it is at equal distance from previous prime (20530529) and next prime (20530553).

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 2468041 = 4250^2 + 1571^2 .

It is a cyclic number.

It is not a de Polignac number, because 20530541 - 2¹⁸ = 20268397 is a prime.

It is a super-2 number, since 2×20530541² = 843006227505362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20530841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265270 + 10265271.

It is an arithmetic number, because the mean of its divisors is an integer number (10265271).

Almost surely, 2^20530541 is an apocalyptic number.

It is an amenable number.

20530541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20530541 is an equidigital number, since it uses as much as digits as its factorization.

20530541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20530541 is about 4531.0640030792. The cubic root of 20530541 is about 273.8210288086.

The spelling of 20530541 in words is "twenty million, five hundred thirty thousand, five hundred forty-one".