21041189 has 16 divisors (see below), whose sum is σ = 25260480. Its totient is φ = 17314560.

The previous prime is 21041117. The next prime is 21041191. The reversal of 21041189 is 98114012.

It is a cyclic number.

It is not a de Polignac number, because 21041189 - 2⁸ = 21040933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1694 + ... + 6704.

It is an arithmetic number, because the mean of its divisors is an integer number (1578780).

Almost surely, 2^21041189 is an apocalyptic number.

It is an amenable number.

21041189 is a deficient number, since it is larger than the sum of its proper divisors (4219291).

21041189 is a wasteful number, since it uses less digits than its factorization.

21041189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 21041189 is about 4587.0675817999. The cubic root of 21041189 is about 276.0726765483.

The spelling of 21041189 in words is "twenty-one million, forty-one thousand, one hundred eighty-nine".