20804000 has 96 divisors (see below), whose sum is σ = 58496256. Its totient is φ = 7123200.

The previous prime is 20803987. The next prime is 20804053. The reversal of 20804000 is 40802.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27629 + ... + 28371.

It is an arithmetic number, because the mean of its divisors is an integer number (609336).

Almost surely, 2^20804000 is an apocalyptic number.

20804000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20804000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29248128).

20804000 is an abundant number, since it is smaller than the sum of its proper divisors (37692256).

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

20804000 is an equidigital number, since it uses as much as digits as its factorization.

20804000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 20804000 is about 4561.1402083251. The cubic root of 20804000 is about 275.0314013729.

Adding to 20804000 its reverse (40802), we get a palindrome (20844802).

The spelling of 20804000 in words is "twenty million, eight hundred four thousand".