320237335813 has 4 divisors (see below), whose sum is σ = 320721810508. Its totient is φ = 319752861120.

The previous prime is 320237335811. The next prime is 320237335819. The reversal of 320237335813 is 318533732023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318533732023 = 13 ⋅24502594771.

It can be written as a sum of positive squares in 2 ways, for example, as 214301407329 + 105935928484 = 462927^2 + 325478^2 .

It is a cyclic number.

It is not a de Polignac number, because 320237335813 - 2¹ = 320237335811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320237335811) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 242236356 + ... + 242237677.

It is an arithmetic number, because the mean of its divisors is an integer number (80180452627).

Almost surely, 2^320237335813 is an apocalyptic number.

It is an amenable number.

320237335813 is a deficient number, since it is larger than the sum of its proper divisors (484474695).

320237335813 is an equidigital number, since it uses as much as digits as its factorization.

320237335813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484474694.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 320237335813 in words is "three hundred twenty billion, two hundred thirty-seven million, three hundred thirty-five thousand, eight hundred thirteen".