20713853065 has 8 divisors (see below), whose sum is σ = 26318778120. Its totient is φ = 15596312832.

The previous prime is 20713853063. The next prime is 20713853087. The reversal of 20713853065 is 56035831702.

It can be written as a sum of positive squares in 4 ways, for example, as 6439099536 + 14274753529 = 80244^2 + 119477^2 .

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 20713853065 - 2¹ = 20713853063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20713853063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121846110 + ... + 121846279.

It is an arithmetic number, because the mean of its divisors is an integer number (3289847265).

Almost surely, 2^20713853065 is an apocalyptic number.

It is an amenable number.

20713853065 is a deficient number, since it is larger than the sum of its proper divisors (5604925055).

20713853065 is a wasteful number, since it uses less digits than its factorization.

20713853065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243692411.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 20713853065 in words is "twenty billion, seven hundred thirteen million, eight hundred fifty-three thousand, sixty-five".