20334421465 has 4 divisors (see below), whose sum is σ = 24401305764. Its totient is φ = 16267537168.

The previous prime is 20334421439. The next prime is 20334421517. The reversal of 20334421465 is 56412443302.

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 6520885504 + 13813535961 = 80752^2 + 117531^2 .

It is a cyclic number.

It is not a de Polignac number, because 20334421465 - 2³¹ = 18186937817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20334421465.

It is an unprimeable number.

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, 2033442142 + ... + 2033442151.

It is an arithmetic number, because the mean of its divisors is an integer number (6100326441).

Almost surely, 2^20334421465 is an apocalyptic number.

It is an amenable number.

20334421465 is a deficient number, since it is larger than the sum of its proper divisors (4066884299).

20334421465 is an equidigital number, since it uses as much as digits as its factorization.

20334421465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066884298.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 20334421465 its reverse (56412443302), we get a palindrome (76746864767).

The spelling of 20334421465 in words is "twenty billion, three hundred thirty-four million, four hundred twenty-one thousand, four hundred sixty-five".