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20684600 = 2352103423
BaseRepresentation
bin100111011100…
…1111100111000
31102220212221022
41032321330320
520243401400
62015202012
7340546646
oct116717470
942825838
1020684600
1110748712
126b16308
134392c11
142a66196
151c38b85
hex13b9f38

20684600 has 24 divisors (see below), whose sum is σ = 48092160. Its totient is φ = 8273760.

The previous prime is 20684581. The next prime is 20684611. The reversal of 20684600 is 648602.

It is a self number, because there is not a number n which added to its sum of digits gives 20684600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51512 + ... + 51911.

It is an arithmetic number, because the mean of its divisors is an integer number (2003840).

Almost surely, 220684600 is an apocalyptic number.

20684600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20684600 is an abundant number, since it is smaller than the sum of its proper divisors (27407560).

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

20684600 is a wasteful number, since it uses less digits than its factorization.

20684600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103439 (or 103430 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20684600 is about 4548.0325416602. The cubic root of 20684600 is about 274.5042307325.

The spelling of 20684600 in words is "twenty million, six hundred eighty-four thousand, six hundred".

Divisors: 1 2 4 5 8 10 20 25 40 50 100 200 103423 206846 413692 517115 827384 1034230 2068460 2585575 4136920 5171150 10342300 20684600