20830800 has 60 divisors (see below), whose sum is σ = 66731840. Its totient is φ = 5554560.

The previous prime is 20830751. The next prime is 20830807. The reversal of 20830800 is 803802.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7480 + ... + 9879.

Almost surely, 2^20830800 is an apocalyptic number.

20830800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20830800 is an abundant number, since it is smaller than the sum of its proper divisors (45901040).

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

20830800 is a wasteful number, since it uses less digits than its factorization.

20830800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17380 (or 17369 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20830800 is about 4564.0771246770. The cubic root of 20830800 is about 275.1494504460.

The spelling of 20830800 in words is "twenty million, eight hundred thirty thousand, eight hundred".