1986973499994 has 64 divisors (see below), whose sum is σ = 4707281744640. Its totient is φ = 547078371840.

The previous prime is 1986973499957. The next prime is 1986973500047. The reversal of 1986973499994 is 4999943796891.

It is a Harshad number since it is a multiple of its sum of digits (87).

It is a self number, because there is not a number n which added to its sum of digits gives 1986973499994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 931009 + ... + 2200164.

It is an arithmetic number, because the mean of its divisors is an integer number (73551277260).

Almost surely, 2^{1986973499994} is an apocalyptic number.

1986973499994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1986973499994 is an abundant number, since it is smaller than the sum of its proper divisors (2720308244646).

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

1986973499994 is a wasteful number, since it uses less digits than its factorization.

1986973499994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131735.

The product of its digits is 8571080448, while the sum is 87.

The spelling of 1986973499994 in words is "one trillion, nine hundred eighty-six billion, nine hundred seventy-three million, four hundred ninety-nine thousand, nine hundred ninety-four".