13000519381 has 4 divisors (see below), whose sum is σ = 13134545452. Its totient is φ = 12866493312.

The previous prime is 13000519369. The next prime is 13000519421. The reversal of 13000519381 is 18391500031.

13000519381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18391500031 = 17 ⋅1081852943.

It can be written as a sum of positive squares in 2 ways, for example, as 2607736356 + 10392783025 = 51066^2 + 101945^2 .

It is a cyclic number.

It is not a de Polignac number, because 13000519381 - 2⁷ = 13000519253 is a prime.

It is a super-2 number, since 2×13000519381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000519331) by changing a digit.

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, 67012890 + ... + 67013083.

It is an arithmetic number, because the mean of its divisors is an integer number (3283636363).

Almost surely, 2^13000519381 is an apocalyptic number.

It is an amenable number.

13000519381 is a deficient number, since it is larger than the sum of its proper divisors (134026071).

13000519381 is an equidigital number, since it uses as much as digits as its factorization.

13000519381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134026070.

The product of its (nonzero) digits is 3240, while the sum is 31.

The spelling of 13000519381 in words is "thirteen billion, five hundred nineteen thousand, three hundred eighty-one".