20209512959 has 2 divisors, whose sum is σ = 20209512960. Its totient is φ = 20209512958.

The previous prime is 20209512937. The next prime is 20209512989. The reversal of 20209512959 is 95921590202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20209512959 - 2⁸ = 20209512703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20209512919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10104756479 + 10104756480.

It is an arithmetic number, because the mean of its divisors is an integer number (10104756480).

Almost surely, 2^20209512959 is an apocalyptic number.

20209512959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20209512959 is an equidigital number, since it uses as much as digits as its factorization.

20209512959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 44.

The spelling of 20209512959 in words is "twenty billion, two hundred nine million, five hundred twelve thousand, nine hundred fifty-nine".