20835804 has 48 divisors (see below), whose sum is σ = 54875520. Its totient is φ = 6095040.

The previous prime is 20835803. The next prime is 20835809. The reversal of 20835804 is 40853802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20835803) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1107 + ... + 6549.

It is an arithmetic number, because the mean of its divisors is an integer number (1143240).

Almost surely, 2^20835804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20835804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27437760).

20835804 is an abundant number, since it is smaller than the sum of its proper divisors (34039716).

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

20835804 is a wasteful number, since it uses less digits than its factorization.

20835804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490 (or 5488 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20835804 is about 4564.6252858258. The cubic root of 20835804 is about 275.1714809267.

It can be divided in two parts, 2083 and 5804, that added together give a palindrome (7887).

The spelling of 20835804 in words is "twenty million, eight hundred thirty-five thousand, eight hundred four".