20272476209 has 2 divisors, whose sum is σ = 20272476210. Its totient is φ = 20272476208.

The previous prime is 20272476167. The next prime is 20272476239. The reversal of 20272476209 is 90267427202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19832525584 + 439950625 = 140828^2 + 20975^2 .

It is a cyclic number.

It is not a de Polignac number, because 20272476209 - 2²⁰ = 20271427633 is a prime.

It is not a weakly prime, because it can be changed into another prime (20272476239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10136238104 + 10136238105.

It is an arithmetic number, because the mean of its divisors is an integer number (10136238105).

Almost surely, 2^20272476209 is an apocalyptic number.

It is an amenable number.

20272476209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20272476209 is an equidigital number, since it uses as much as digits as its factorization.

20272476209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 41.

The spelling of 20272476209 in words is "twenty billion, two hundred seventy-two million, four hundred seventy-six thousand, two hundred nine".