12186903893 has 2 divisors, whose sum is σ = 12186903894. Its totient is φ = 12186903892.

The previous prime is 12186903889. The next prime is 12186903907. The reversal of 12186903893 is 39830968121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12186614449 + 289444 = 110393^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 12186903893 - 2² = 12186903889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12186903853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6093451946 + 6093451947.

It is an arithmetic number, because the mean of its divisors is an integer number (6093451947).

Almost surely, 2^12186903893 is an apocalyptic number.

It is an amenable number.

12186903893 is a deficient number, since it is larger than the sum of its proper divisors (1).

12186903893 is an equidigital number, since it uses as much as digits as its factorization.

12186903893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 12186903893 in words is "twelve billion, one hundred eighty-six million, nine hundred three thousand, eight hundred ninety-three".