20808200 has 96 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 7011840.

The previous prime is 20808107. The next prime is 20808233. The reversal of 20808200 is 280802.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124517 + ... + 124683.

It is an arithmetic number, because the mean of its divisors is an integer number (585900).

Almost surely, 2^20808200 is an apocalyptic number.

20808200 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 20808200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28123200).

20808200 is an abundant number, since it is smaller than the sum of its proper divisors (35438200).

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

20808200 is a wasteful number, since it uses less digits than its factorization.

20808200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 20808200 is about 4561.6005962820. The cubic root of 20808200 is about 275.0499082972.

It can be divided in two parts, 20808 and 200, that multiplied together give a square (4161600 = 2040²).

The spelling of 20808200 in words is "twenty million, eight hundred eight thousand, two hundred".