2013138845 has 4 divisors (see below), whose sum is σ = 2415766620. Its totient is φ = 1610511072.

The previous prime is 2013138839. The next prime is 2013138847. The reversal of 2013138845 is 5488313102.

It is a happy number.

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 1526230489 + 486908356 = 39067^2 + 22066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013138845 - 2²² = 2008944541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013138847) 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, 201313880 + ... + 201313889.

It is an arithmetic number, because the mean of its divisors is an integer number (603941655).

Almost surely, 2^2013138845 is an apocalyptic number.

It is an amenable number.

2013138845 is a deficient number, since it is larger than the sum of its proper divisors (402627775).

2013138845 is an equidigital number, since it uses as much as digits as its factorization.

2013138845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402627774.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 2013138845 is about 44868.0158353364. The cubic root of 2013138845 is about 1262.6740147682.

The spelling of 2013138845 in words is "two billion, thirteen million, one hundred thirty-eight thousand, eight hundred forty-five".