20698579356 has 48 divisors (see below), whose sum is σ = 59442077184. Its totient is φ = 5458965696.

The previous prime is 20698579339. The next prime is 20698579357. The reversal of 20698579356 is 65397589602.

It is a self number, because there is not a number n which added to its sum of digits gives 20698579356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20698579357) 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, 9476280 + ... + 9478463.

It is an arithmetic number, because the mean of its divisors is an integer number (1238376608).

Almost surely, 2^20698579356 is an apocalyptic number.

20698579356 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20698579356 is an abundant number, since it is smaller than the sum of its proper divisors (38743497828).

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

20698579356 is a wasteful number, since it uses less digits than its factorization.

20698579356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18954770 (or 18954768 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 60.

The spelling of 20698579356 in words is "twenty billion, six hundred ninety-eight million, five hundred seventy-nine thousand, three hundred fifty-six".