20004189 has 8 divisors (see below), whose sum is σ = 28241280. Its totient is φ = 12551616.

The previous prime is 20004139. The next prime is 20004191. The reversal of 20004189 is 98140002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20004189 - 2⁸ = 20003933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004139) 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, 196069 + ... + 196170.

It is an arithmetic number, because the mean of its divisors is an integer number (3530160).

Almost surely, 2^20004189 is an apocalyptic number.

It is an amenable number.

20004189 is a deficient number, since it is larger than the sum of its proper divisors (8237091).

20004189 is a wasteful number, since it uses less digits than its factorization.

20004189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392259.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20004189 is about 4472.6042749163. The cubic root of 20004189 is about 271.4607114955.

The spelling of 20004189 in words is "twenty million, four thousand, one hundred eighty-nine".