12044893987 has 16 divisors (see below), whose sum is σ = 14090961600. Its totient is φ = 10291533504.

The previous prime is 12044893969. The next prime is 12044893997. The reversal of 12044893987 is 78939844021.

It is not a de Polignac number, because 12044893987 - 2³¹ = 9897410339 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12044893997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53343 + ... + 164119.

It is an arithmetic number, because the mean of its divisors is an integer number (880685100).

Almost surely, 2^12044893987 is an apocalyptic number.

12044893987 is a deficient number, since it is larger than the sum of its proper divisors (2046067613).

12044893987 is an equidigital number, since it uses as much as digits as its factorization.

12044893987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111115 (or 111101 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 12044893987 in words is "twelve billion, forty-four million, eight hundred ninety-three thousand, nine hundred eighty-seven".