20519077 has 2 divisors, whose sum is σ = 20519078. Its totient is φ = 20519076.

The previous prime is 20519063. The next prime is 20519099. The reversal of 20519077 is 77091502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11464996 + 9054081 = 3386^2 + 3009^2 .

It is a cyclic number.

It is not a de Polignac number, because 20519077 - 2¹⁹ = 19994789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20519027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10259538 + 10259539.

It is an arithmetic number, because the mean of its divisors is an integer number (10259539).

Almost surely, 2^20519077 is an apocalyptic number.

It is an amenable number.

20519077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20519077 is an equidigital number, since it uses as much as digits as its factorization.

20519077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 20519077 is about 4529.7987814030. The cubic root of 20519077 is about 273.7700532282.

The spelling of 20519077 in words is "twenty million, five hundred nineteen thousand, seventy-seven".