20210539 has 2 divisors, whose sum is σ = 20210540. Its totient is φ = 20210538.

The previous prime is 20210513. The next prime is 20210551. The reversal of 20210539 is 93501202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20210539 - 2⁹ = 20210027 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210599) 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, 10105269 + 10105270.

It is an arithmetic number, because the mean of its divisors is an integer number (10105270).

Almost surely, 2^20210539 is an apocalyptic number.

20210539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210539 is an equidigital number, since it uses as much as digits as its factorization.

20210539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20210539 is about 4495.6133063243. The cubic root of 20210539 is about 272.3909234349.

The spelling of 20210539 in words is "twenty million, two hundred ten thousand, five hundred thirty-nine".