20113515115 has 4 divisors (see below), whose sum is σ = 24136218144. Its totient is φ = 16090812088.

The previous prime is 20113515101. The next prime is 20113515119. The reversal of 20113515115 is 51151531102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20113515115 - 2²⁵ = 20079960683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20113515115.

It is not an unprimeable number, because it can be changed into a prime (20113515119) 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, 2011351507 + ... + 2011351516.

It is an arithmetic number, because the mean of its divisors is an integer number (6034054536).

Almost surely, 2^20113515115 is an apocalyptic number.

20113515115 is a deficient number, since it is larger than the sum of its proper divisors (4022703029).

20113515115 is an equidigital number, since it uses as much as digits as its factorization.

20113515115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022703028.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 20113515115 in words is "twenty billion, one hundred thirteen million, five hundred fifteen thousand, one hundred fifteen".