20609069265 has 12 divisors (see below), whose sum is σ = 35722386804. Its totient is φ = 10991503584.

The previous prime is 20609069263. The next prime is 20609069279. The reversal of 20609069265 is 56296090602.

It can be written as a sum of positive squares in 2 ways, for example, as 15312577536 + 5296491729 = 123744^2 + 72777^2 .

It is not a de Polignac number, because 20609069265 - 2¹ = 20609069263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 457979317 = 20609069265 / (2 + 0 + 6 + 0 + 9 + 0 + 6 + 9 + 2 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 20609069265.

It is not an unprimeable number, because it can be changed into a prime (20609069263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228989614 + ... + 228989703.

It is an arithmetic number, because the mean of its divisors is an integer number (2976865567).

Almost surely, 2^20609069265 is an apocalyptic number.

It is an amenable number.

20609069265 is a deficient number, since it is larger than the sum of its proper divisors (15113317539).

20609069265 is a wasteful number, since it uses less digits than its factorization.

20609069265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457979328 (or 457979325 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 20609069265 in words is "twenty billion, six hundred nine million, sixty-nine thousand, two hundred sixty-five".