20189894 has 16 divisors (see below), whose sum is σ = 31968000. Its totient is φ = 9536904.

The previous prime is 20189891. The next prime is 20189899. The reversal of 20189894 is 49898102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20189891) 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, 22319 + ... + 23205.

It is an arithmetic number, because the mean of its divisors is an integer number (1998000).

Almost surely, 2^20189894 is an apocalyptic number.

20189894 is a deficient number, since it is larger than the sum of its proper divisors (11778106).

20189894 is a wasteful number, since it uses less digits than its factorization.

20189894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 20189894 is about 4493.3165924515. The cubic root of 20189894 is about 272.2981430213.

The spelling of 20189894 in words is "twenty million, one hundred eighty-nine thousand, eight hundred ninety-four".