1994118816 has 48 divisors (see below), whose sum is σ = 5323298400. Its totient is φ = 653438208.

The previous prime is 1994118787. The next prime is 1994118817. The reversal of 1994118816 is 6188114991.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1994118817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170371 + ... + 181698.

It is an arithmetic number, because the mean of its divisors is an integer number (110902050).

Almost surely, 2^1994118816 is an apocalyptic number.

1994118816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1994118816 is an abundant number, since it is smaller than the sum of its proper divisors (3329179584).

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

1994118816 is a wasteful number, since it uses less digits than its factorization.

1994118816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352141 (or 352133 counting only the distinct ones).

The product of its digits is 124416, while the sum is 48.

The square root of 1994118816 is about 44655.5575040778. The cubic root of 1994118816 is about 1258.6848661446.

The spelling of 1994118816 in words is "one billion, nine hundred ninety-four million, one hundred eighteen thousand, eight hundred sixteen".