2100011994 has 40 divisors (see below), whose sum is σ = 4708371360. Its totient is φ = 699589224.

The previous prime is 2100011981. The next prime is 2100011999. The reversal of 2100011994 is 4991100012.

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

It is not an unprimeable number, because it can be changed into a prime (2100011999) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 402897 + ... + 408075.

It is an arithmetic number, because the mean of its divisors is an integer number (117709284).

Almost surely, 2^2100011994 is an apocalyptic number.

2100011994 is an abundant number, since it is smaller than the sum of its proper divisors (2608359366).

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

2100011994 is a wasteful number, since it uses less digits than its factorization.

2100011994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696 (or 7687 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 2100011994 is about 45825.8878146403. The cubic root of 2100011994 is about 1280.5816029617.

The spelling of 2100011994 in words is "two billion, one hundred million, eleven thousand, nine hundred ninety-four".