20804850 has 120 divisors (see below), whose sum is σ = 63196848. Its totient is φ = 5032800.

The previous prime is 20804837. The next prime is 20804869. The reversal of 20804850 is 5840802.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 44317 + ... + 44783.

Almost surely, 2^20804850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20804850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31598424).

20804850 is an abundant number, since it is smaller than the sum of its proper divisors (42391998).

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

20804850 is a wasteful number, since it uses less digits than its factorization.

20804850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 20804850 is about 4561.2333858289. The cubic root of 20804850 is about 275.0351470229.

The spelling of 20804850 in words is "twenty million, eight hundred four thousand, eight hundred fifty".