20698898943 has 4 divisors (see below), whose sum is σ = 27598531928. Its totient is φ = 13799265960.

The previous prime is 20698898929. The next prime is 20698899007. The reversal of 20698898943 is 34989889602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20698898943 - 2⁸ = 20698898687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20698898923) 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 3 ways as a sum of consecutive naturals, for example, 3449816488 + ... + 3449816493.

It is an arithmetic number, because the mean of its divisors is an integer number (6899632982).

Almost surely, 2^20698898943 is an apocalyptic number.

20698898943 is a deficient number, since it is larger than the sum of its proper divisors (6899632985).

20698898943 is an equidigital number, since it uses as much as digits as its factorization.

20698898943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6899632984.

The product of its (nonzero) digits is 53747712, while the sum is 66.

The spelling of 20698898943 in words is "twenty billion, six hundred ninety-eight million, eight hundred ninety-eight thousand, nine hundred forty-three".