2145320520013 has 24 divisors (see below), whose sum is σ = 2360982670200. Its totient is φ = 1947892193280.

The previous prime is 2145320520011. The next prime is 2145320520041. The reversal of 2145320520013 is 3100250235412.

It can be written as a sum of positive squares in 4 ways, for example, as 1446001440004 + 699319080009 = 1202498^2 + 836253^2 .

It is not a de Polignac number, because 2145320520013 - 2¹ = 2145320520011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145320520011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 477478395 + ... + 477482887.

It is an arithmetic number, because the mean of its divisors is an integer number (98374277925).

Almost surely, 2^{2145320520013} is an apocalyptic number.

It is an amenable number.

2145320520013 is a deficient number, since it is larger than the sum of its proper divisors (215662150187).

2145320520013 is a wasteful number, since it uses less digits than its factorization.

2145320520013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8493 (or 8482 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 2145320520013 its reverse (3100250235412), we get a palindrome (5245570755425).

The spelling of 2145320520013 in words is "two trillion, one hundred forty-five billion, three hundred twenty million, five hundred twenty thousand, thirteen".