2100189 has 32 divisors (see below), whose sum is σ = 3539200. Its totient is φ = 1100736.

The previous prime is 2100181. The next prime is 2100191. The reversal of 2100189 is 9810012.

It is not a de Polignac number, because 2100189 - 2³ = 2100181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

2100189 is a modest number, since divided by 189 gives 21 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13299 + ... + 13455.

It is an arithmetic number, because the mean of its divisors is an integer number (110600).

2^2100189 is an apocalyptic number.

It is an amenable number.

2100189 is a deficient number, since it is larger than the sum of its proper divisors (1439011).

2100189 is a wasteful number, since it uses less digits than its factorization.

2100189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 2100189 is about 1449.2028843471. The cubic root of 2100189 is about 128.0617581210.

It can be divided in two parts, 2100 and 189, that multiplied together give a square (396900 = 630²).

The spelling of 2100189 in words is "two million, one hundred thousand, one hundred eighty-nine".