20104189 has 4 divisors (see below), whose sum is σ = 22976224. Its totient is φ = 17232156.

The previous prime is 20104187. The next prime is 20104193. The reversal of 20104189 is 98140102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98140102 = 2 ⋅49070051.

It is a cyclic number.

It is not a de Polignac number, because 20104189 - 2¹ = 20104187 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 (20104181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436007 + ... + 1436020.

It is an arithmetic number, because the mean of its divisors is an integer number (5744056).

Almost surely, 2^20104189 is an apocalyptic number.

It is an amenable number.

20104189 is a deficient number, since it is larger than the sum of its proper divisors (2872035).

20104189 is an equidigital number, since it uses as much as digits as its factorization.

20104189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2872034.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 20104189 is about 4483.7695079029. The cubic root of 20104189 is about 271.9122996167.

The spelling of 20104189 in words is "twenty million, one hundred four thousand, one hundred eighty-nine".