20698579236 has 24 divisors (see below), whose sum is σ = 49474653984. Its totient is φ = 6731245120.

The previous prime is 20698579229. The next prime is 20698579247. The reversal of 20698579236 is 63297589602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21034650 + ... + 21035633.

It is an arithmetic number, because the mean of its divisors is an integer number (2061443916).

Almost surely, 2^20698579236 is an apocalyptic number.

It is an amenable number.

20698579236 is an abundant number, since it is smaller than the sum of its proper divisors (28776074748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20698579236 is a wasteful number, since it uses less digits than its factorization.

20698579236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42070331 (or 42070329 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 20698579236 in words is "twenty billion, six hundred ninety-eight million, five hundred seventy-nine thousand, two hundred thirty-six".