20520053 has 2 divisors, whose sum is σ = 20520054. Its totient is φ = 20520052.

The previous prime is 20520043. The next prime is 20520061. The reversal of 20520053 is 35002502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 386884 = 4487^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 20520053 - 2¹⁰ = 20519029 is a prime.

It is a Chen prime.

It is equal to p_1301462 and since 20520053 and 1301462 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20520043) 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, 10260026 + 10260027.

It is an arithmetic number, because the mean of its divisors is an integer number (10260027).

Almost surely, 2^20520053 is an apocalyptic number.

It is an amenable number.

20520053 is a deficient number, since it is larger than the sum of its proper divisors (1).

20520053 is an equidigital number, since it uses as much as digits as its factorization.

20520053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 20520053 is about 4529.9065111766. The cubic root of 20520053 is about 273.7743938285.

Adding to 20520053 its reverse (35002502), we get a palindrome (55522555).

The spelling of 20520053 in words is "twenty million, five hundred twenty thousand, fifty-three".