20150513105 has 4 divisors (see below), whose sum is σ = 24180615732. Its totient is φ = 16120410480.

The previous prime is 20150513093. The next prime is 20150513111. The reversal of 20150513105 is 50131505102.

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 5865721744 + 14284791361 = 76588^2 + 119519^2 .

It is not a de Polignac number, because 20150513105 - 2²⁰ = 20149464529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015051306 + ... + 2015051315.

It is an arithmetic number, because the mean of its divisors is an integer number (6045153933).

Almost surely, 2^20150513105 is an apocalyptic number.

It is an amenable number.

20150513105 is a deficient number, since it is larger than the sum of its proper divisors (4030102627).

20150513105 is an equidigital number, since it uses as much as digits as its factorization.

20150513105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030102626.

The product of its (nonzero) digits is 750, while the sum is 23.

The spelling of 20150513105 in words is "twenty billion, one hundred fifty million, five hundred thirteen thousand, one hundred five".