12000001986 has 64 divisors (see below), whose sum is σ = 31299912960. Its totient is φ = 3335904000.

The previous prime is 12000001921. The next prime is 12000001999. The reversal of 12000001986 is 68910000021.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 415015 + ... + 442986.

It is an arithmetic number, because the mean of its divisors is an integer number (489061140).

Almost surely, 2^12000001986 is an apocalyptic number.

12000001986 is an abundant number, since it is smaller than the sum of its proper divisors (19299910974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12000001986 is a wasteful number, since it uses less digits than its factorization.

12000001986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858056 (or 858050 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 12000001986 in words is "twelve billion, one thousand, nine hundred eighty-six".