12136515018 has 64 divisors (see below), whose sum is σ = 25718280192. Its totient is φ = 3810488000.

The previous prime is 12136514983. The next prime is 12136515019. The reversal of 12136515018 is 81051563121.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12136515018.

It is not an unprimeable number, because it can be changed into a prime (12136515019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2552143 + ... + 2556893.

It is an arithmetic number, because the mean of its divisors is an integer number (401848128).

Almost surely, 2^12136515018 is an apocalyptic number.

12136515018 is an abundant number, since it is smaller than the sum of its proper divisors (13581765174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12136515018 is a wasteful number, since it uses less digits than its factorization.

12136515018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059.

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 12136515018 in words is "twelve billion, one hundred thirty-six million, five hundred fifteen thousand, eighteen".