12186465987 has 4 divisors (see below), whose sum is σ = 16248621320. Its totient is φ = 8124310656.

The previous prime is 12186465971. The next prime is 12186466021. The reversal of 12186465987 is 78956468121.

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

It is not a de Polignac number, because 12186465987 - 2⁴ = 12186465971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12186465937) 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, 2031077662 + ... + 2031077667.

It is an arithmetic number, because the mean of its divisors is an integer number (4062155330).

Almost surely, 2^12186465987 is an apocalyptic number.

12186465987 is a deficient number, since it is larger than the sum of its proper divisors (4062155333).

12186465987 is an equidigital number, since it uses as much as digits as its factorization.

12186465987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062155332.

The product of its digits is 5806080, while the sum is 57.

The spelling of 12186465987 in words is "twelve billion, one hundred eighty-six million, four hundred sixty-five thousand, nine hundred eighty-seven".