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20100200 = 2352100501
BaseRepresentation
bin100110010101…
…1010001101000
31101211012021212
41030223101220
520121201300
61554452252
7332564111
oct114532150
941735255
1020100200
111038963a
126894088
134219c13
142953208
151b70935
hex132b468

20100200 has 24 divisors (see below), whose sum is σ = 46733430. Its totient is φ = 8040000.

The previous prime is 20100191. The next prime is 20100203. The reversal of 20100200 is 200102.

It can be written as a sum of positive squares in 3 ways, for example, as 11303044 + 8797156 = 3362^2 + 2966^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is not an unprimeable number, because it can be changed into a prime (20100203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50051 + ... + 50450.

Almost surely, 220100200 is an apocalyptic number.

20100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100200 is an abundant number, since it is smaller than the sum of its proper divisors (26633230).

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

20100200 is a wasteful number, since it uses less digits than its factorization.

20100200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100517 (or 100508 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 5.

The square root of 20100200 is about 4483.3246592233. The cubic root of 20100200 is about 271.8943144776.

Adding to 20100200 its reverse (200102), we get a palindrome (20300302).

The spelling of 20100200 in words is "twenty million, one hundred thousand, two hundred".

Divisors: 1 2 4 5 8 10 20 25 40 50 100 200 100501 201002 402004 502505 804008 1005010 2010020 2512525 4020040 5025050 10050100 20100200