20698238265 has 16 divisors (see below), whose sum is σ = 34012241088. Its totient is φ = 10740707136.

The previous prime is 20698238263. The next prime is 20698238311. The reversal of 20698238265 is 56283289602.

It is not a de Polignac number, because 20698238265 - 2¹ = 20698238263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20698238263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18646507 + ... + 18647616.

It is an arithmetic number, because the mean of its divisors is an integer number (2125765068).

Almost surely, 2^20698238265 is an apocalyptic number.

It is an amenable number.

20698238265 is a deficient number, since it is larger than the sum of its proper divisors (13314002823).

20698238265 is a wasteful number, since it uses less digits than its factorization.

20698238265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37294168.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 20698238265 in words is "twenty billion, six hundred ninety-eight million, two hundred thirty-eight thousand, two hundred sixty-five".