2098832821805 has 4 divisors (see below), whose sum is σ = 2518599386172. Its totient is φ = 1679066257440.

The previous prime is 2098832821793. The next prime is 2098832821807. The reversal of 2098832821805 is 5081282388902.

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

It can be written as a sum of positive squares in 2 ways, for example, as 246454659364 + 1852378162441 = 496442^2 + 1361021^2 .

It is not a de Polignac number, because 2098832821805 - 2⁶ = 2098832821741 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 (2098832821807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209883282176 + ... + 209883282185.

It is an arithmetic number, because the mean of its divisors is an integer number (629649846543).

Almost surely, 2^{2098832821805} is an apocalyptic number.

It is an amenable number.

2098832821805 is a deficient number, since it is larger than the sum of its proper divisors (419766564367).

2098832821805 is an equidigital number, since it uses as much as digits as its factorization.

2098832821805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419766564366.

The product of its (nonzero) digits is 4423680, while the sum is 56.

The spelling of 2098832821805 in words is "two trillion, ninety-eight billion, eight hundred thirty-two million, eight hundred twenty-one thousand, eight hundred five".