20520041 has 2 divisors, whose sum is σ = 20520042. Its totient is φ = 20520040.

The previous prime is 20520029. The next prime is 20520043. The reversal of 20520041 is 14002502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19009600 + 1510441 = 4360^2 + 1229^2 .

It is a cyclic number.

It is not a de Polignac number, because 20520041 - 2⁶ = 20519977 is a prime.

Together with 20520043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20519998 and 20520025.

It is not a weakly prime, because it can be changed into another prime (20520043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10260020 + 10260021.

It is an arithmetic number, because the mean of its divisors is an integer number (10260021).

Almost surely, 2^20520041 is an apocalyptic number.

It is an amenable number.

20520041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20520041 is an equidigital number, since it uses as much as digits as its factorization.

20520041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 20520041 is about 4529.9051866457. The cubic root of 20520041 is about 273.7743404613.

Adding to 20520041 its reverse (14002502), we get a palindrome (34522543).

The spelling of 20520041 in words is "twenty million, five hundred twenty thousand, forty-one".