20076509 has 2 divisors, whose sum is σ = 20076510. Its totient is φ = 20076508.

The previous prime is 20076491. The next prime is 20076523. The reversal of 20076509 is 90567002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20052484 + 24025 = 4478^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 20076509 - 2⁸ = 20076253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20076569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10038254 + 10038255.

It is an arithmetic number, because the mean of its divisors is an integer number (10038255).

Almost surely, 2^20076509 is an apocalyptic number.

It is an amenable number.

20076509 is a deficient number, since it is larger than the sum of its proper divisors (1).

20076509 is an equidigital number, since it uses as much as digits as its factorization.

20076509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 20076509 is about 4480.6817561617. The cubic root of 20076509 is about 271.7874501912.

The spelling of 20076509 in words is "twenty million, seventy-six thousand, five hundred nine".