20005894 has 8 divisors (see below), whose sum is σ = 30089160. Its totient is φ = 9976176.

The previous prime is 20005891. The next prime is 20005903. The reversal of 20005894 is 49850002.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005891) 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, 12439 + ... + 13954.

It is an arithmetic number, because the mean of its divisors is an integer number (3761145).

Almost surely, 2^20005894 is an apocalyptic number.

20005894 is a deficient number, since it is larger than the sum of its proper divisors (10083266).

20005894 is a wasteful number, since it uses less digits than its factorization.

20005894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26774.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20005894 is about 4472.7948756901. The cubic root of 20005894 is about 271.4684236696.

Adding to 20005894 its reverse (49850002), we get a palindrome (69855896).

The spelling of 20005894 in words is "twenty million, five thousand, eight hundred ninety-four".