20798184065 has 8 divisors (see below), whose sum is σ = 24996760488. Its totient is φ = 16612587520.

The previous prime is 20798184059. The next prime is 20798184067. The reversal of 20798184065 is 56048189702.

It can be written as a sum of positive squares in 4 ways, for example, as 1907330929 + 18890853136 = 43673^2 + 137444^2 .

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

It is not a de Polignac number, because 20798184065 - 2²² = 20793989761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20798184067) 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, 3241442 + ... + 3247851.

It is an arithmetic number, because the mean of its divisors is an integer number (3124595061).

Almost surely, 2^20798184065 is an apocalyptic number.

It is an amenable number.

20798184065 is a deficient number, since it is larger than the sum of its proper divisors (4198576423).

20798184065 is an equidigital number, since it uses as much as digits as its factorization.

20798184065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6489939.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 20798184065 in words is "twenty billion, seven hundred ninety-eight million, one hundred eighty-four thousand, sixty-five".