20830194 has 144 divisors (see below), whose sum is σ = 60821280. Its totient is φ = 5080320.

The previous prime is 20830169. The next prime is 20830211. The reversal of 20830194 is 49103802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 184282 + ... + 184394.

It is an arithmetic number, because the mean of its divisors is an integer number (422370).

Almost surely, 2^20830194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20830194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30410640).

20830194 is an abundant number, since it is smaller than the sum of its proper divisors (39991086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20830194 is a wasteful number, since it uses less digits than its factorization.

20830194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20830194 is about 4564.0107361837. The cubic root of 20830194 is about 275.1467822466.

Adding to 20830194 its reverse (49103802), we get a palindrome (69933996).

The spelling of 20830194 in words is "twenty million, eight hundred thirty thousand, one hundred ninety-four".