12987031185 has 32 divisors (see below), whose sum is σ = 23094852480. Its totient is φ = 6924377664.

The previous prime is 12987031147. The next prime is 12987031249. The reversal of 12987031185 is 58113078921.

It is not a de Polignac number, because 12987031185 - 2¹⁸ = 12986769041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12987031185.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520659 + ... + 545031.

It is an arithmetic number, because the mean of its divisors is an integer number (721714140).

Almost surely, 2^12987031185 is an apocalyptic number.

12987031185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12987031185 is a deficient number, since it is larger than the sum of its proper divisors (10107821295).

12987031185 is a wasteful number, since it uses less digits than its factorization.

12987031185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28334 (or 28328 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 12987031185 in words is "twelve billion, nine hundred eighty-seven million, thirty-one thousand, one hundred eighty-five".