12186947690 has 16 divisors (see below), whose sum is σ = 21938360328. Its totient is φ = 4874366976.

The previous prime is 12186947683. The next prime is 12186947701. The reversal of 12186947690 is 9674968121.

It can be written as a sum of positive squares in 4 ways, for example, as 8776504489 + 3410443201 = 93683^2 + 58399^2 .

It is a super-2 number, since 2×12186947690² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91634 + ... + 181026.

Almost surely, 2^12186947690 is an apocalyptic number.

12186947690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12186947690 is a deficient number, since it is larger than the sum of its proper divisors (9751412638).

12186947690 is a wasteful number, since it uses less digits than its factorization.

12186947690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103033.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 12186947690 in words is "twelve billion, one hundred eighty-six million, nine hundred forty-seven thousand, six hundred ninety".