2111191984 has 80 divisors (see below), whose sum is σ = 4622454144. Its totient is φ = 925747200.

The previous prime is 2111191969. The next prime is 2111192003. The reversal of 2111191984 is 4891911112.

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 15 ways as a sum of consecutive naturals, for example, 626464 + ... + 629824.

Almost surely, 2^2111191984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111191984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2311227072).

2111191984 is an abundant number, since it is smaller than the sum of its proper divisors (2511262160).

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

2111191984 is a wasteful number, since it uses less digits than its factorization.

2111191984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506 (or 3500 counting only the distinct ones).

The product of its digits is 5184, while the sum is 37.

The square root of 2111191984 is about 45947.7092356083. The cubic root of 2111191984 is about 1282.8500912377.

The spelling of 2111191984 in words is "two billion, one hundred eleven million, one hundred ninety-one thousand, nine hundred eighty-four".