20240775666313 has 4 divisors (see below), whose sum is σ = 20938733447940. Its totient is φ = 19542817884688.

The previous prime is 20240775666301. The next prime is 20240775666337. The reversal of 20240775666313 is 31366657704202.

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 4793069518864 + 15447706147449 = 2189308^2 + 3930357^2 .

It is a cyclic number.

It is not a de Polignac number, because 20240775666313 - 2¹³ = 20240775658121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20240775666343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348978890770 + ... + 348978890827.

It is an arithmetic number, because the mean of its divisors is an integer number (5234683361985).

Almost surely, 2^{20240775666313} is an apocalyptic number.

It is an amenable number.

20240775666313 is a deficient number, since it is larger than the sum of its proper divisors (697957781627).

20240775666313 is an equidigital number, since it uses as much as digits as its factorization.

20240775666313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697957781626.

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 20240775666313 in words is "twenty trillion, two hundred forty billion, seven hundred seventy-five million, six hundred sixty-six thousand, three hundred thirteen".