1994850218109 has 24 divisors (see below), whose sum is σ = 3276056544768. Its totient is φ = 1072860620160.

The previous prime is 1994850218099. The next prime is 1994850218189. The reversal of 1994850218109 is 9018120584991.

It is not a de Polignac number, because 1994850218109 - 2⁴ = 1994850218093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1994850218189) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 399127197 + ... + 399132194.

It is an arithmetic number, because the mean of its divisors is an integer number (136502356032).

Almost surely, 2^{1994850218109} is an apocalyptic number.

It is an amenable number.

1994850218109 is a deficient number, since it is larger than the sum of its proper divisors (1281206326659).

1994850218109 is a wasteful number, since it uses less digits than its factorization.

1994850218109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798259425 (or 798259418 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 57.

The spelling of 1994850218109 in words is "one trillion, nine hundred ninety-four billion, eight hundred fifty million, two hundred eighteen thousand, one hundred nine".