20524849 has 2 divisors, whose sum is σ = 20524850. Its totient is φ = 20524848.

The previous prime is 20524813. The next prime is 20524871. The reversal of 20524849 is 94842502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10284849 + 10240000 = 3207^2 + 3200^2 .

It is a cyclic number.

It is not a de Polignac number, because 20524849 - 2⁹ = 20524337 is a prime.

It is not a weakly prime, because it can be changed into another prime (20524249) 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, 10262424 + 10262425.

It is an arithmetic number, because the mean of its divisors is an integer number (10262425).

Almost surely, 2^20524849 is an apocalyptic number.

It is an amenable number.

20524849 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524849 is an equidigital number, since it uses as much as digits as its factorization.

20524849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 20524849 is about 4530.4358509971. The cubic root of 20524849 is about 273.7957212541.

The spelling of 20524849 in words is "twenty million, five hundred twenty-four thousand, eight hundred forty-nine".