20185894 has 16 divisors (see below), whose sum is σ = 31067568. Its totient is φ = 9833472.

The previous prime is 20185883. The next prime is 20185967. The reversal of 20185894 is 49858102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12222 + ... + 13774.

It is an arithmetic number, because the mean of its divisors is an integer number (1941723).

Almost surely, 2^20185894 is an apocalyptic number.

20185894 is a deficient number, since it is larger than the sum of its proper divisors (10881674).

20185894 is a wasteful number, since it uses less digits than its factorization.

20185894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 20185894 is about 4492.8714648875. The cubic root of 20185894 is about 272.2801593622.

The spelling of 20185894 in words is "twenty million, one hundred eighty-five thousand, eight hundred ninety-four".