20305262869 has 8 divisors (see below), whose sum is σ = 20598214680. Its totient is φ = 20013751296.

The previous prime is 20305262867. The next prime is 20305262899. The reversal of 20305262869 is 96826250302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1656083025 + 18649179844 = 40695^2 + 136562^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20305262869 - 2¹ = 20305262867 is a prime.

It is a super-2 number, since 2×20305262869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305262867) 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 7 ways as a sum of consecutive naturals, for example, 331644 + ... + 388069.

It is an arithmetic number, because the mean of its divisors is an integer number (2574776835).

Almost surely, 2^20305262869 is an apocalyptic number.

It is an amenable number.

20305262869 is a deficient number, since it is larger than the sum of its proper divisors (292951811).

20305262869 is an equidigital number, since it uses as much as digits as its factorization.

20305262869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720119.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 20305262869 in words is "twenty billion, three hundred five million, two hundred sixty-two thousand, eight hundred sixty-nine".