20344322100665 has 8 divisors (see below), whose sum is σ = 25008630094728. Its totient is φ = 15878495297920.

The previous prime is 20344322100593. The next prime is 20344322100679. The reversal of 20344322100665 is 56600122344302.

It can be written as a sum of positive squares in 4 ways, for example, as 338131783081 + 20006190317584 = 581491^2 + 4472828^2 .

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

It is not a de Polignac number, because 20344322100665 - 2¹⁰ = 20344322099641 is a prime.

It is a super-3 number, since 3×20344322100665³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49620297602 + ... + 49620298011.

It is an arithmetic number, because the mean of its divisors is an integer number (3126078761841).

Almost surely, 2^{20344322100665} is an apocalyptic number.

It is an amenable number.

20344322100665 is a deficient number, since it is larger than the sum of its proper divisors (4664307994063).

20344322100665 is an equidigital number, since it uses as much as digits as its factorization.

20344322100665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99240595659.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 20344322100665 its reverse (56600122344302), we get a palindrome (76944444444967).

The spelling of 20344322100665 in words is "twenty trillion, three hundred forty-four billion, three hundred twenty-two million, one hundred thousand, six hundred sixty-five".