2001100188 has 24 divisors (see below), whose sum is σ = 4872244608. Its totient is φ = 638031856.

The previous prime is 2001100187. The next prime is 2001100207. The reversal of 2001100188 is 8810011002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001100187) 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, 3624906 + ... + 3625457.

It is an arithmetic number, because the mean of its divisors is an integer number (203010192).

Almost surely, 2^2001100188 is an apocalyptic number.

It is an amenable number.

2001100188 is an abundant number, since it is smaller than the sum of its proper divisors (2871144420).

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

2001100188 is a wasteful number, since it uses less digits than its factorization.

2001100188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250393 (or 7250391 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 2001100188 is about 44733.6583346366. The cubic root of 2001100188 is about 1260.1520325493.

The spelling of 2001100188 in words is "two billion, one million, one hundred thousand, one hundred eighty-eight".